Introduction to Reproduction in Animals In order for an animal to prevent its extinction, it needs to reproduce. Just as in the case of plants where there has to be male and female gametes, so it is in the case of animals. In fact, sexual reproduction in plants and animals are very similar. For the…
Tag: Reproduction in Animals
Male Reproductive System
Male Reproductive System The diagram below shows the male reproductive system. Vas deferens (sperm duct) – transports sperm to the urethra. Bladder – stores urine. Urethra – carries urine and sperm to the penis where they are released. Penis – deposits sperm into the vagina and also gets rid of urine. Testis – one of…
Female Reproductive System
Female Reproductive System In humans, as is the case with mammals, the females carry the developing offspring inside. Fallopian tubes (oviducts) – channels the egg down to the uterus. Fertilization occurs here. Ovary – produces and releases a mature egg each month. Uterus – protects and nourishes the developing baby. The endometrium lines the uterus.…
The Menstrual Cycle and Pregnancy
The Menstrual Cycle and Pregnancy This cycle occurs in females only and happens on a monthly basis. A typical cycle is 28 days long and begins with menstruation (period). Changes in hormone levels make this cycle possible. The two hormones involved are oestrogen and progesterone. NOTE: the menstrual cycle is not the same thing as…
Birth Control
Birth Control The term birth control (contraception) is quite self-explanatory. It involves means by which individuals try to regulate the occurrence of pregnancy. There are natural and artificial means of contraception. Natural methods of contraception include: -Rhythm method – sexual intercourse is limited to the ‘safe period’ of the menstrual cycle. -Withdrawal method – no…