Question

Answer the following questions in your
own words.
a. Explain the functional correlation of
circulatory system with respiratory,
digestive and excretory system.
b. Explain the structure and function of
human blood.
c. Explain the importance and need of
blood donation
Explain the differences.
​

Answer 1

Answer:

Explanation:

The functional correlation between circulatory system with respiratory, digestive and excretory system is as follows:

We already know that during respiration exchange of gases occurs in the lungs. The respiratory system causes the diffusion of oxygen into the blood and the diffusion of CO2 out of the blood. The oxygen is then transported to cells of the body via the circulatory system.

The digestive system is responsible for producing nutrients by breaking complex molecules into simpler ones. The circulatory system then transports these nutrients to different cells and tissues.

The excretory system is responsible for the elimination of waste products from the body.

These waste products are transported by blood to the excretory system.

Blood, fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart (or an equivalent structure) to all parts of the body, after which it is returned to the heart to repeat the process.

Donating blood is a vital way to help save lives. Along with helping save lives, there are a number of reasons why donating blood is important. A single donation can save three lives.

hope it helps you .....

Answer 2

What is the Circulatory System ?

The circulatory system performs the function of transportation in humans.

They transport:

1. Nutrients
2. Gases
3. Excretory Waste

to and from different parts of the body.

A.1 Relation between Circulatory System with the Digestive System:

The digestive system performs the function of making a smooth batter of the complex food we intake, or, breaking-down complex nutrient molecules into simpler ones, which are easier to absorb.

The digested food is absorbed by finger-like structures in the small intestines, known as villi.

Villi contain blood and lymphatic vessels which absorb carbohydrates and proteins; and fats respectively.

Now, the absorbed nutrients need to be transported to various parts of the body for its cells to carry out their life processes.

The circulatory system provides a medium for the transport.

A.2 Relation between Circulatory System and the Respiratory System

Once all cells have a supply of nutrients, they still can't use them to perform life processes because to do so, energy is required and this energy can not be provided by these nutrients alone.

Energy is given out in the form of ATP molecules when glucose reacts with oxygen.

Hence, oxygen from the outer environment needs to be transported to these cells so that glucose is oxidized and energy is given out, which can be used to perform life functions.

From the alveoli in the lungs, which are richly supplied with blood capillaries, oxygen combines with haemoglobin, a red-coloured pigment found in RBCs of blood to be further transported to all parts of the body.

Glucose oxidation gives out carbon-dioxide, which again needs to be transported from the parts of the body to out of the body.

This is done by carbon-dioxide mixing in the blood in the form of carbonates etc. Here, carbon-dioxide is a respiratory waste and it can be studied under excretion also.

A.3 Relation between Circulatory System and the Excretory System

Once energy from food is obtained, and functions like repairing and growth are performed, some waste materials are generated.

For example, during respiration, carbon-dioxide is given out as a waste material as discussed above.

Also, during the digestion of proteins, ammonia, a harmful nitrogenous waste is produced, which reacts with carbon-dioxide in the liver to form urea.

Now, this needs to be transported from the liver to excretory organs of the body (kidneys).

This transportation medium is provided by the circulatory system.

The dorsal aorta carries oxygenated but impure blood, containing nitrogenous wastes which enters the kidneys through the renal arteries and, the inferior vena cava brings back de-oxygenated but pur blood, containing no nitrogenous wastes which leaves the kidney through the renal veins.

B.1 Human Blood: Components

Blood is a connective tissue, which is constituted by the following:

1. Blood Plasma: It is a fluid in which all the other components float. It is composed mainly of water and contains other components dissolved in it as well, for example, carbon-dioxide, in form of carbonates etc.
2. Red Blood Cells: They contain a red-coloured pigment call haemoglobin, which reacts with oxygen and carries it to the entire body.
3. White Blood Cells: They fight against foreign objects inside the body.
4. Platelets: They help in repairing the circulatory system in case any leakage develops in the system.

B.2 Human Blood: Function

1. Carry nutrients from small intestines to the entire body.
2. Carry oxygen from alveoli in lungs to the entire body.
3. Carry carbon-dioxide from the body to the alveoli.
4. Carry urea from liver to kidneys.
5. WBCs of blood make up the immunity of the body.

C. Importance and Need for Blood Donation

Due to some accidents, if a major leakage develops in the system, then platelets alone can't do the repairing.

Due to excessive loss of blood, the person may even die.

In such cases, the patient needs to have blood from another person, whose blood group is the same.

The other person, as mentioned above is the blood donor.