Here is the breakdown of listed macro molecules:
Carbohydrates will break down into smaller and simpler units called glucose. Glucose is the simplest carbohydrate. Glucose is present in our blood and stored in liver in a form of glycogen.
Proteins will break down into amino acid. Amino acids are the building blocks of protein. There are 3 different types of protein present in our body: primary, tertiary and Quaternary.
Fats will be hydrolyzed into triglycerides and glycerol.
Answer:
D.
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1,2and,3 those are all the answers
Answer: Valves in the veins
Explanation: The flow of the blood inside the body takes place through the veins and arteries. The oxygenated blood from the heart is supplied to the different parts of the body.
The blood flows from the capillaries to the venules and from there to the veins. The blood moves in the veins by the rhythmic movement of the smooth muscles in the body.
Most of the blood moves against the gravity so there is a chance that it can backflow so to prevent this there are valves in the veins known as one way valves.
