What Are the Functions of Blood?

Blood is a red, opaque, viscous liquid that flows through human blood vessels and the heart. Blood is composed of plasma and blood cells. One liter of plasma contains 900-910 grams of water, 65-85 grams of protein, and 20 grams of low-molecular substances. There are many electrolytes and organic compounds in low-molecular substances. Blood cells include red and white blood cells And platelets. The average lifespan of red blood cells is 120 days, the lifespan of white blood cells is 9-13 days, and the lifespan of platelets is 8-9 days. Under normal circumstances, each person has 40ml of blood cells aging and dying every day. At the same time, a corresponding number of cells were born. The function of blood includes two parts: blood cell function and plasma function. It has four functions: transportation, regulating human temperature, defense, regulating human osmotic pressure and acid-base balance.

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Blood flows in people

Blood is a tissue that circulates through the heart and blood vessel cavities. Adult blood accounts for approximately

1. Referred to as blood. In humans or higher animals

Blood is made up of plasma and blood cells.

(1) Plasma

Plasma is equivalent to the intercellular substance of connective tissue. The serum is a pale yellow translucent liquid.

There are three types of blood cells:

1. Red blood cells are responsible for delivering oxygen to the body.
2. Delivery of nutrition, such as

If a healthy person does not lose more than 10% of the total blood volume at one time, it will not affect the body much. When one blood loss exceeds 20% of the total blood volume, it has a serious impact on health; when it exceeds 30% of the total blood volume, it is life-threatening. Because blood circulates in the cardiovascular system and spreads throughout the body. It maintains the connection between the entire body and the external environment, and also maintains the interconnection between organs and tissues. Specifically, blood has the following important physiological functions ^[1]

Insect blood (more appropriately called

Wound bleeding ^[1]

The generation of blood is very interesting, just like a relay race on a track and field.

Blood itself is a highly nutritious substance, so blood production must also have a wide range of nutrients. The main ingredients needed for hematopoietic

The temperature of the blood is 37 degrees Celsius and the density is 1.0501.060 × 10 ^ 3kg / m ^ 3, ^[1]

AIDS

1. Don't take drugs. Drug addicts should quit, and don't share syringes and needles to inject drugs before quitting. ^[3]

2. Don't go to hospitals and clinics where disinfection is not guaranteed to get an injection, tooth extraction or surgery. ^[3]

3. Children must have one injection and one tube for vaccinations. ^[3]

4. Don't go to the barbershop, shop and beauty salon without disinfection to get haircut and beauty treatment. ^[3]

5. Don't pierce ears and tattoos with non-sterile needles. ^{[1] [3]}

6. Pedicure and corns knife must be disinfected. ^[3]

7. Shavers, electric shavers, and toothbrushes must be prepared by themselves and cannot be borrowed. ^[3]

8. Rescuing the wounded, to prevent blood from getting on your skin and mucous membranes. ^[3]

9. Bleeding from trauma caused by sports activities is also dangerous. ^[3]