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A model of the movement system of the nervous system of the respiratory system. 中文版

A model of the movement system of the nervous system of the respiratory system.

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Updated: 2018-05-13 12:59
About Product:This model is applicable to secondary schools, secondary specialized and tertiary teaching of biology.

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Qinghua science instruments 12yr.
Main Products:	Human model human organ model animal plant specimen model human skeleton teaching equipment biological model
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Reproductive system:Male genitalia include testis, epididymis, vasculature, ejaculatory duct, seminal vesicle gland, prostate and so on. The genitals have a penis and scrotum. Female genitalia include ovaries, fallopian tubes, uterus and vagina. The external genitalia is ventral, clitoris, labia, hymen and vestibule. The function of the reproductive system is to produce reproductive cells, to reproduce new individuals, to secrete sex hormones and to maintain sexual characteristics.
There are male and female reproductive systems. The genital area is divided into two parts: the internal genital organ and the external genitalia.

Blood vessels are conduits for blood flow and are divided into three types: arteries, veins and capillaries. The arteries begin to grow from the heart and branches, and the diameter gradually becomes thinner, and the walls gradually become thinner. Finally, they are divided into a large number of capillaries, which are distributed to all tissues and cells of the body. The capillaries gradually merge into veins and eventually return to the heart. Arteries and veins are conduits for blood, and capillaries are places where blood is exchanged with tissues.

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