Human Life Cycle (the total length of answers is about 3500 words)

May 5th, 2015
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Here you can find answers for the following questions: 1) Compile a table which compares spermatogenesis and oogenesis. This table should highlight at least four similarities and four differences. (100 words) 2) Identify and describe three secondary sexual characteristics in both males and females. (150 words) 3) Explain the effects of ageing on the female reproductive system. (200 words) 4) Describe the main stages of the menstrual cycle, using referenced illustrations. (250 words) 5) What is HCG and how does it maintain pregnancy? (200 words) 6) Discuss the development of the foetus from the point of fertilization to birth. Your description should be divided into the three trimester (from fertilization to 3 months; 4 to 6 months; 7 months to parturition). (800 words) 7) What changes occur in the circulation, lungs and liver of the neonate during birth, and why are these important? (400 words) 8) What is the structure and role of the placenta?

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TAQ11. Compile a table which compares spermatogenesis and oogenesis. This table shouldhighlight at least four similarities and four differences. (100 words)SpermatogenesisOogenesisSimilarities:1. Number of phases2. Multiplication phase3. Growth phase4. Maturation phaseBoth processes include three phases: multiplication, growth, andmaturation.Germcelldividesbymitosiswithproductionofspermatogonium/oogonium respectively.Spermatogonium/oogonium gives rise to spermatocyte/oocyteConsists of two meiotic divisions.Differences1. Result of meiotic divisions2. Number of gametes3. Location4. Size and motilityFour spermatozoidsOne ovum and two polar bodies.Spermatozoids are formed along The numbers of gametes arethe whole humans life.constant because they aregenerated during the fetal period.Along the womans life theiramount is decreased after eachmenstrual cycle.All stages are inside the testes.All stages, except last, are insidethe ovary.Small (head is about 4mm)Large (about 120mm), andimmotile.(98 words)2. Identify and describe three secondary sexual characteristics in both males and females.(150 words)Answer: The first sexual characteristic which appears in both males and females is additional hair growth.In males hair rises on the face, abdomen, chest, pubes, and in the armpits. In females hair growth includesarmpits and pubic hair. The penis and testes are enlarged while the girls have breast size increasing. Thevagina b

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