SPATIAL ENVIRONMENTAL VARIATION

Environmental variation also occurs from place to place due to large-scale variation in climate, topography, and soil type

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#Unit 7. System Physiology – Animal

Three estrogens are present in the plasma of the human female: 

1β-estradiol

 Estrone

Estriol

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#Unit 7. System Physiology – Animal

The principal estrogen secreted by the ovaries is β-estradiol

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#Unit 7. System Physiology – Animal

Estrogens inhibit osteoclastic activity in the bones and therefore stimulate bone growth.

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#Unit 7. System Physiology – Animal

During female reproductive cycle, Estrogen stimulate rapid proliferation of the stromal cells and the epithelial cells of endometrium, before ovulation.

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#Unit 7. System Physiology – Animal

Progesterone promote secretory changes in the uterine endometrium, after ovulation

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#Unit 7. System Physiology – Animal