Corpo Humano. Fundamentos de Anatomia e Fisiologia

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During puberty, the menstrual cycle begins for the first time, in response to low estrogen and progesterone levels the hypothalamus releases gonadotropin releasing hormone (GnRH).

imprescindíbel para a existencia do ser humano, que non pode estar sen beber máis de cinco ou seis días sen poñer en risco a súa vida.Existen só uns poucos tecidos básicos, como o epitelial, o conxuntivo, o muscular e o nervioso, cos que o organismo se relaciona, se protexe, segrega substancias, mantén a súa forma, se despraza, coordina as súas funcións e se relaciona co medio. The body is also host to about the same number of non-human cells [4] as well as multicellular organisms which reside in the gastrointestinal tract and on the skin.

With over 6 million of the world’s best eBooks to choose from, Kobo offers you a whole world of reading. The integumentary system consists of the covering of the body (the skin), including hair and nails as well as other functionally important structures such as the sweat glands and sebaceous glands. The body consists of many different types of tissue, defined as cells that act with a specialised function.

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However, not all cells have DNA; some cells such as mature red blood cells lose their nucleus as they mature. Internally, the female reproductive system contains two ovaries, the uterus, two fallopian tubes and the cervix.Vesalian illustrations include the contemplative skeleton man (leaf 28r); and the muscle man with diaphragm (leaf 71 r). A viewer recently submitted this incredible arm tattoo on one of her students at City College of San Francisco.