Between ectoderm and endoderm is a supporting layer of gelatinous substance termed mesoglea, secreted by the cell layers of the body wall.[18] The mesoglea can contain skeletal elements derived from cells migrated from the ectoderm. The sac-like body built up in this way is attached to ...
Renin, enzyme secreted bythe kidney(and also, possibly, by the placenta) that is part of a physiological system that regulates blood pressure. In the blood, renin acts on a protein known as angiotensinogen, resulting in the release of angiotensin I. How does renin work in the kidneys? Renin...
The brain is the most important and most complex organ within the human body The brain controls all thoughts and processes in the body including movement (both voluntary and involuntary), behavior, the senses, and one;s intelligence. The brain is ...
What is the hormone secreted by the hypothalamus that stimulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary? It also triggers the onset of puberty. What is the hormone se...
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