CBSE Lecture 7 Science Chapter 11 Transport in Animals and Plants Revision Notes- [Kostenloser PDF-Download]– Here is the PDF of theNCERT Class 7 Science Chapter 11 Transport in animals and plants Notesvonspeed labs. The notes were written by experts in the field, and the chapter explains how plants and humans function by transporting substances and nutrients throughout their bodies. In addition, the chapter deals with excretion in animals and humans.
To prepare for your exams, you can visit the SpeEdLabs websiteNCERT Class 7 Science Chapter 11 Notes. The notes in this chapter clarify the general concept of the topic. Withspeed labsyou can download CBSE Solutions (NCERT) for free. you can also download itNCERT solutions for 7th grade mathjNCERT Grade 7 Science Solutionsto help you review the whole program and get more points for your exams.
transportation in animals
- The basic needs of animals are food, water and oxygen to survive.
- These basic needs must be supplied to every part of the animal's body for energy and this is done through the circulatory system.
- And the residues formed in the animal's body must be eliminated by transporting them to the excretory system.
- The circulatory system consists of blood, blood vessels and the heart.
- It is the circulation of oxygen, minerals and nutrients to all parts of the body through the blood.
- Blood is a red liquid and is formed by the presence of hemoglobin.
- Hemoglobin is responsible for transporting oxygen to all parts of the body.
- There are three types of cells in the blood
- Red blood cells (erythrocytes):It carries oxygen from the lungs to different parts of the body and carbon dioxide from different parts of the body to the lungs.
- White Blood Cells (WBC):It provides immunity against foreign microorganisms that can cause disease and infection.
- platelets:They form a shield-like structure at the site of injury to stop bleeding; this is commonly known as blood clotting.
Plasma:Blood contains cells and liquid, the liquid part is called plasma.
- The tubular structure through which blood flows is called a blood vessel.
There are three types of blood vessels:
- arteries:They carry oxygen-rich blood from the heart to the tissues of the body.
- Arrive:They transport oxygen-poor blood from body tissues to the heart.
- capillaries:This acts as a binding agent that binds to the arteries and veins.
- It is a muscular organ located on the left side of the chest and is about the size of a fist.
- It is the most important organ in our body because it helps carry oxygen and other nutrients through the blood.
- The heart is divided into four chambers to keep oxygenated and deoxygenated blood from mixing.
- The two upper chambers of the heart are called the atria and are the left atrium and right atrium.
- The two lower chambers of the heart are called the ventricles and are the left ventricle and the right ventricle.
- The heartbeat is the contraction and relaxation of the muscles that line the walls of the heart's chambers.
excretion in animals
- The removal of unwanted or waste materials from the body is called excretion.
- Carbon dioxide is eliminated from the animal body through the process of exhalation.
- Undigested food is eliminated from the animal's body through the ingestion process.
excretory system in humans
- The system responsible for removing waste from the body is called the excretory system.
- It is formed by the kidneys, ureter, urine and urethra.
- Rand:It has a bean-shaped structure and its main function is to filter the blood and remove waste in the form of urine.
- Bladder:It stores urine so that urination is not continuous.
- Ureter:It has a tube-like structure that connects the kidney and urinary bladder and provides the pathway for urine flow from the kidney to the urinary bladder.
- Urethra:It is a urinary opening that allows urine to exit our body.
transportation in the factory
- The basic needs of plants are water, nutrients and carbon dioxide to survive.
- The leaves prepare food through the process of photosynthesis, which combines water and carbon dioxide.
- transport of water and minerals
- Plants absorb water and minerals from the soil through their roots.
- The transport of water, minerals and food in plants occurs through vascular tissues.
- Vascular tissues are tube-like structures in plants that allow the transport of water, minerals, and food. It is connected from the leaves to the roots.
There are two types of vascular tissues:
- Xilema:Helps transport water and minerals from the roots to all parts of the plant.
- Stock:Helps transport the food prepared by the leaves to all parts of the plant.
- The water absorbed by the roots must be transported to the leaves, that is to say to the upper part of the plant, therefore the upward movement of the water is due to the phenomenon known as transpiration.
- Transpiration is the process of losing water from leaves in the form of water vapor.
- When water is lost, the leaves create suction, allowing water to be drawn back from the roots to the leaves.
Lecture 7 Science Transport in Animals and Plants Review Notes
The system that carries blood from the heart to different parts of our body and back to the heart is called the circulatory system. The human circulatory system consists of:
- Herz:A very muscular structure in the chest cavity.
- blood vessels:Arteries, veins and capillaries.
- Sangre:A fluid connective tissue that circulates through this system.
Let's examine each component in more detail.
The heart is the most important and sensitive element of our body. It beats continuously to act as a pump to transport blood. The heart is placed in the chest cavity, tilted slightly to the left. It's the size of a human fist. The human heart has four chambers; The top two chambers are called the atria, while the bottom two are called the ventricles. The partition between the chambers helps prevent oxygen-rich blood from mixing with carbon dioxide-rich blood.
The left side of the heart receives oxygen-rich blood from the lungs and sends it to all parts of the body, while the right side receives carbon dioxide-rich blood from all parts of the body and sends it to the lungs for purification.
- Heartbeat:A heartbeat is a rhythmic contraction followed by a relaxation of the heart muscles.
- Legumes:The pulse is the beating of an artery due to the pressure of blood flow.
- Stethoscope:It is a heart sound amplification device.
It is a liquid connective tissue. The liquid part is called plasma. Plasma consists of various suspended cells. The heart circulates blood throughout the body.
- Red blood cells (erythrocytes):It contains a red pigment called hemoglobin, which gives blood its distinctive red color. This dye binds oxygen and transports it to all blood cells.
- White Blood Cells (WBC):It protects us by fighting pathogens.
- platelets:Helps blood to clot at the injury site.
- The main function of the blood is to carry oxygen from the lungs to all parts of the body and carbon dioxide to the lungs for purification.
- It transports digested food to all parts of the body.
- Blood maintains a constant body temperature.
- It also transports waste products to the kidneys for excretion.
The three types of blood vessels are arteries, veins and capillaries. Arteries and veins act in opposition, while capillaries form the connecting link.
- Arteries are blood vessels that carry oxygen-rich blood to the cells and tissues of our body.
- They carry blood from the heart to the tissues.
- Veins are blood vessels that carry deoxygenated blood from the cells and tissues of our body.
- They transport blood from the tissues to the heart.
- Capillaries are the smallest blood vessels in the body.
- It fulfills the most important task of the circulatory system: the exchange of substances between the circulatory system and the cells.
- The fine mesh width facilitates the diffusion process of the materials by increasing the surface area.
excretion in animals and humans
Elimination is the process of removing metabolic waste from the body.
excretion in animals
- In organisms such as amoebas, hydra, sponges, etc. there are no special organs of excretion. Waste products are eliminated by diffusion over the general body surface.
- In aquatic animals such as fish, cellular waste such as ammonia dissolves directly in the water.
- Birds, reptiles and insects excrete nitrogenous waste in the form of uric acid.
- Other land mammals excrete urea as their main nitrogenous waste.
human excretory system
- There are two kidneys in the human excretory system, one on the right and one on the left, just below the stomach. Kidneys are also called magic filters because they only filter unwanted substances from the blood.
- Urine passes from the kidneys into the urinary bladder through the tubular uterus. Urine is stored in the urinary bladder and is expelled through the urinary opening called the urethra.
- An adult person excretes around 1 to 1.8 liters of urine per day.
- When the kidneys stop working properly, waste products begin to build up in the blood. This is very dangerous for humans. A technique called dialysis is used to filter the blood on a regular basis.
- Sweat is the moisture expelled from the pores present in the skin. It is produced by the skin's sweat glands. Sweat removes water and salts from the body.
transport in plants
The vascular system of plants helps move water, minerals, food, or waste from one part of the plant to another to perform various functions. It is made up of two types of tubes called the xylem and phloem.
- A tissue is a group of cells that perform a specific function in an organism. The vascular tissue for the transport of water and minerals in plants is the xylem, while the transport of organic products of photosynthesis is carried out by the phloem.
- Both xylem and phloem are arranged in a compact structure called vascular bundles.
The xylem forms a network of ducts that help carry water and dissolved minerals up, i.e., being taken up from the roots through the stem to the leaves. They are usually made up of dead cells.
The phloem contains receptacles called sieve tubes that transport food downward, that is, from those formed by the leaves, to all parts of the plant. They are usually made up of living cells.
Transport water and minerals
- Plant roots have small growths called root hairs through which water and dissolved mineral salts penetrate. Root hair increases the surface area for absorbing water and minerals. Roots absorb water from the soil through a process called osmosis.
- Osmosis is a process by which water is passed through a cell membrane a short distance from an area where it is higher to an area where it is lower.
- Root cells continuously absorb water and mineral salts from the soil. Some of the excess water taken up by the roots is lost as water vapor through the stomata in the leaves through transpiration. This creates a suction force that carries the water in tall trees to great heights. Transpiration also cools the plant.
Also read -
- Plant Nutrition: Lecture 7 Chapter 1 Scientific Notes
- Animal Nutrition: Lecture 7 Chapter 2 Scientific Notes
- Fibrous Fabrics: Class 7 Chapter 3 Scientific Notes
- Heat: Classroom 7 Chapter 4 Scientific Notes
- Acids, Bases and Salts: Lecture 7 Chapter 5 Scientific Notes
- Physical and Chemical Changes: Lecture 7 Chapter 6 Scientific Notes
- Weather Climate and Adaptation of Animals to Climate: Class 7 Chapter 7 Scientific Notes
- Winds, Storms and Hurricanes: Lecture 7 Chapter 8 Scientific Notes
- Solo: Class 7 Chapter 9 Scientific Notes
- The Inhalation of Organisms: Lecture 7 Chapter 10 Scientific Notes
Chapter 11 Classroom 7 NotesClassroom 7 Chapter 11 NotesTransport in Animals and Plants: Lecture 7 Chapter 11 Scientific Notes