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These three layers give rise to all the various types of tissue in the body. The endoderm later forms the lining of the tongue , digestive tract , lungs , bladder and several glands . The mesoderm forms muscle , bone , and lymph tissue, as well as the interior of the lungs, heart , and reproductive and excretory systems .
The kittens become independent at 7 to 10 months old, but remain with the mother until around 20 months old. Survival of the young depends heavily on the availability of prey species. In the wild, both males and females reach sexual maturity at the age of one year, though in practice they rarely breed until a territory becomes vacant; one ...
Most mammals are viviparous, giving birth to live young. [1] However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. [2] In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian ...
A vaginal delivery is the birth of offspring in mammals (babies in humans) through the vagina (also called the "birth canal"). [1] It is the most common method of childbirth worldwide. [ 2 ] It is considered the preferred method of delivery, as it is correlated with lower morbidity and mortality than caesarean sections (C-sections), [ 3 ...
A breech birth is when a baby is born bottom first instead of head first, as is normal. [1] Around 3–5% of pregnant women at term (37–40 weeks pregnant) have a breech baby. [2] Due to their higher than average rate of possible complications for the baby, breech births are generally considered higher risk. [3]
4. Showing Off Their Belly. Much like slow blinking, a cat exposing its belly to their special person is a sign of significant trust. As the Toronto Humane Society explains, cats are loathe to ...
Examples of symptoms include intrusive symptoms, flashbacks and nightmares, as well as symptoms of avoidance (including amnesia for the whole or parts of the event), problems in developing a mother-child attachment, and others similar to those commonly experienced in posttraumatic stress disorder (PTSD).
Kittens with FCKS may die (or have to be euthanised) very soon after onset. There are two points at which breeders report kittens that were otherwise doing well deteriorating and dying: at 10 days of age and at 3 weeks. Generally, if the kitten is still flat, but survives the 3-week developmental stage, its prognosis is good.