Question

E. Answer the following questions.
1. Briefly explain the transport of water and minerals in plants.
2.
Describe, in brief, the function of heart.
3. State the functions of the three types of blood vessels.
4.
Give one function each of RBC, WBC and platelets.
5.
Draw a neat and well labelled diagram of the human excretory system.​

Answer 1

Explanation:

1. In plants, minerals and water are transported through the xylem cells from soil to the leaves. ... The root cells obtain ions from the soil which creates a difference in the concentration of ions between the roots and soil. Thus, there is a continuous water movement into the xylem.

2. The heart has four chambers:

The right atrium receives blood from the veins and pumps it to the right ventricle.

The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen.

The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.

The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body. The left ventricle’s vigorous contractions create our blood pressure.

The coronary arteries run along the surface of the heart and provide oxygen-rich blood to the heart muscle. A web of nerve tissue also runs through the heart, conducting the complex signals that govern contraction and relaxation. Surrounding the heart is a sac called the pericardium.

3. Blood vessel. The blood vessels are part of the circulatory system and function to transport blood throughout the body. The most important types, arteries and veins, carry blood away from or towards the heart, respectively

There are three main types of blood vessels:

Arteries. They carry oxygen-rich blood away from the heart to all of the body's tissues.

Capillaries. These are small, thin blood vessels that connect the arteries and the veins.

Veins.

4. Red blood cells carry oxygen to all parts of the body. White blood cells help fight infection. ... Proteins in the blood called clotting factors work to form a clot. In order to understand bleeding disorders, you have to know how the proteins and the platelets in the blood work together.

Blood is made mostly of plasma, but 3 main types of blood cells circulate with the plasma:

Platelets help the blood to clot. Clotting stops the blood from flowing out of the body when a vein or artery is broken. ...

Red blood cells carry oxygen. ...

White blood cells ward off infection.

Hope this helps mate.

Answer 2

Answer:

1. In plants, minerals and water are transported through the xylem cells from soil to the leaves. ... The root cells obtain ions from the soil which creates a difference in the concentration of ions between the roots and soil. Thus, there is a continuous water movement into the xylem.
2. The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes. "The tissues of the body need a constant supply of nutrition in order to be active
3. The cellular portion of blood contains red blood cells (RBCs), white blood cells (WBCs) and platelets. The RBCs carry oxygen from the lungs. The WBCs help to fight infection, and platelets are parts of cells that the body uses for clotting. All blood cells are produced in the bone marrow.
4. The main function of blood vessels is to carry blood through the body. The blood carries oxygen, nutrients, and wastes that need to circulate the body. The three kinds of blood vessels are: arteries, veins, and capillaries. The arteries carry blood away from the heart and transport it to the rest of the body.
5. Explanation:

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