Chapter 15: Transport Systems in Living Things Flashcards
What are the 3 main components in the human circulatory system?
Blood, blood vessels and heart.
Why is a transport system needed for a living thing to stay alive?
Each of the parts involved in the transport system has a specific function and work together to move substances around a human or plant.
What are some substances that are transported around the living thing?
Digested food, water and waste
How many times does the heart beat in a minute?
60-100
Why does a unicellular organism not require a transport system?
It is small and it has a larger surface area for diffusion of carbon dioxide and oxygen.
What does the heart do?
The contraction of heart muscles forces blood around the body
Why is a transport system needed in a multicellular organism?
It ensures that oxygen and glucose are transported fast enough throughout the cells of the organism
What are blood vessels?
They are a network of tubes that carry blood around the body
What is blood?
It is a liquid that transports materials around the body. It is also known as a fluid tissue
What does blood contain?
Plasma, red blood cells, white blood cells and platelets.
What are the percentages of the substances in the blood?
55% of blood is made up of plasma
45% of blood is made up of platelets, white blood cells and red blood cells.
What is plasma?
It is a dilute solution of salts, glucose, amino acids, vitamins, urea, proteins and fats
What are the function of platelets?
They are involved in blood clotting
What is the function of plasma?
It transports water and dissolved substances such as digested food, mineral salts and waste products to different parts of the body.
What is the function of red blood cells?
They help to carry oxygen to all parts of our body.
What are the 3 types of blood vessels in our body?
- Veins
- Capillaries
- Arteries
What does the blood carried in the artery contain?
Oxygen and glucose
What does blood carried in the vein contain?
Carbon dioxide and metabolic waste products
The artery carries blood ____ the heart
away from
The vein carries blood ___ the heart
towards
Are the xylem and phloem tissues or organs?
Tissues