Science voc 17
Terms
undefined, object
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- down feather
- a fluffy insolating feather that lies nexts to a birds body
- contour feather
- a feather made of a stiff center, central shaft with many side branches called barb
- preening
- the activity that a bird uses to spread oil on the feathers
- lift
- an upward force on an object that can be explained by differences in pressure above and below the object; lift opposes the downward pull of gravity
- brooding
- when a bird sits on its egg until they hatch
- mammary glands
- glands that secrete a nutritous a fluid called milk
- diaphragm
- the sheet of muscle underneath the lungs of mammals that helps draw air into the lungs
- monotreme
- a mammal that lays eggs
- marsupial
- a mammal that gives birth to live, partially developed young that countinue to develop in the mothers pouch or skin fold
- placental mammal
- a mammal that nurses its unborn offspring with a placenta inside the uterus and gives birth to well developed young
- gestation period
- the time during which an embryo develops within the mother
- gizzard
- contains small stones that grind up the food
- precoal
- chicks that hatch fully active
- altrical chick
- a chick that hatches weak, naked, helpless
- crop
- a organ that holds incoming food
- intestine
- digests the food
- placenta
- a mammal that nourishes its unborn offspring with a placenta inside the uterus and gives birth to well developed young
- uterus
- the organ in the female reproductive system where the zygote grows and develops
- pinnipedes
- fish eating marine mammals