Anatomy of the human body

you to the following systems: skeletal, muscular, cardiovascular, respiratory, digestive, nervous, lymphatic, reproductive, excretory and endocrine system.

200 bones.
The bones of the skull are connected with the first cervical vertebra.
There are 26 bones of the skull.

lumbar and sacral vertebrae and the coccyx. In the spine there are 32 or 34 vertebrae.
7 cervical, 12 thoracic, 5 lumbar, 5 sacral vertebrae and the coccyx.

The breastbone is a long bone in the middle of the chest.
Ribs connect with the breastbone with the help of cartilages and ligaments.
The breastbone connects with 7 ribs on each side of the chest

The upper extremity is formed by arm, forearm and hand.
The lower extremity is formed by thigh, leg and foot

Skeletal system

muscle tissue:
1) smooth muscles,
2) striated muscles,
3) heart muscle.

Muscles are important for the functioning of the body.

The muscle system

Carry blood toward heart
Venules: small veins

Capillaries: microscopic blood vessels that carry blood from arterioles to venules

The heart consists of two separate chambers divided by the septum. Each of the chambers has two connected parts: the atrium and the ventricle.
The heart is an inner hollow muscular organ placed within the chest and included in the pericardium.

cu mm)

Thrombocytes (200 000- 400 000 per cu mm)

Blood is composed of plasma and the corpuscular elements which are called red corpuscles or erythrocytes, white corpuscles or leucocytes and blood platelets or thrombocytes.

The cardiovascular system

located in the chest
the right lung consisting of three lobes
the left lung consisting of two lobes

kg
volume of about 3.21 litres
about 12 billion cells

delicate
the nerve cells in the brain can be «put to sleep»
stimuli comes into the brain through the spinal cord
sleep is of a great protective

the lymphatic system.

seminal vesicles, urethra, typewriter and epididymis.
Male germ cell is called sperm.
Male sex hormones are called androgens.
The main androgen is testosterone

The female system consist of ovaries, uterus, cervix, vagina, fallopian tubes and external genitals.
Female germ cell is called ova.
Female sex hormones are called estrogens.

body by the excretory organs, namely the kidneys, skin and lungs

the nephron, the skin and the lungs

The human kidneys are the major organs of bodily excretion.

Sweat is released through the skin

When they exhale, they release
carbon dioxide, which accumulates
in the blood as waste from cellular respiration

The excretory system

feedback loops of the hormones released by internal glands organism directly into the circulatory system, regulating distant target organs.

The key mechanism of the endocrine system is the hormone.

in the regulation of other endocrine organs
The neck contains the thyroid and parathyroid glands.
Endocrine system in the body consists of a number of glands, which produce regulatory substances