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They make up the reproductive system.
Development failure that results in the of nce absence of organs or tissue is called a
Estrogen
digestive and nervous
Young are developed in the uterus (womb).
Nothing it's just how where made.it would be weird of we didn't have nipples
It is referring to the organs or structures of an organism used to make sperm/pollen etc in the male and ovas in the female and, in the case of the females of certain species, the organs needed/used to develop the young - (eg make the seeds or lay eggs, the marsupial pouch or the mammalian womb) and, if relevant, nourish them (mammalian breasts). The organs needed for reproduction of the species.
The heart
Mammalian diving reflex
All animals have reproductive organs. The reproductive organs on dinosaurs were most likely located in between the legs (much like the majority of mammalian and reptilians species alive today) The way the tails are mounted the thought is they may have organs like the birds of today.
The metabolic rate does change with the development of an animal from a zygote to adult because of the development of the organs. As growth occurs the organs fully develop.
external reproductive organs can be distinguished by the 12th week of development
They make up the reproductive system.
no
heart and brain
When a cow is pregnant with multiple offspring (twins or more) there is movement of hormones between them, particularly if they share the same placenta. In the case where there is a male fetus and a female fetus, the hormones (testosterone) produced by the male can negatively affect development of the female reproductive organs causing her to be born sterile, in which case the reproductive organs of the female are underdeveloped and/or she also displays male reproductive organs. The sterile female calf is thus called a 'freemartin'. This is one reason why it is undesirable for cows to carry multiple offspring and why farmers do not encourage or select for this condition.
Once a foetus is fully developed it has exactly the same organs as a fully grown human.