bone fat- fatty matter in bones extracted with solvents or by boiling or steaming; used chiefly in candles and cheap soaps and in lubricating greases butterfat- the fatty substance of milk from which butter is made fat- a soft greasy substance occurring in organic tissue and consisting of a ...
It's a snake. it has no arms or legs. its skeleton is one long backbone with ribs. 是条蛇。它没有胳膊和腿。它的骨架是一根带肋骨的长脊梁。 Look at these skulls,or head bones. these are the skulls of the animals in this book. look at how the...
Birds have hollow. lightweight bones.They have strong chest muscles to pull their wings up and down. Feathers are important in flight. There are three types of feathers: down feathers. body feathers and flight feathers. Of course. their wings are the important reason why they can fly.1. ...
The Archaeopteryx is a theropod, a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods could be as small as the Archaeopteryx or as large as Tyrannosaurus Rex, but all were bipeds with two strong back legs to stand on and two short forelimb...
... jaw. The construction of these teeth is very singular; they are hollow for a portion of their length, and in each tooth is found a narrow slit communicating with the central hollow; the root of the fang rests on a kind of bag, containing a certain quantity of a liquid poison, ...
It’s probably also important to know that present-day birds share many flying-specific features with Quetzalcoatlus and Pterosaurs in general (relatively small bodies/hollow bones for lightness and large brains/good eyesight for, you know, not crashing) but present-day birds did not evolve from...
Feathers are important to birds because they keep them warm,help them to fly, and provide camouflage ().Hollow bones also help in flying because they help make the bird light enough to fly.Although an important characteristic of birds is flying, not all birds fly. Some birds that don't ...
Other differences between two-toed and three-toed sloths include the number of bones in their necks. Two-toed sloths have five to seven neck vertebrae. Three-toed sloths have eight or nine of these vertebrae. Among all other mammals except Manatees, this makes these animals unique. All other...
Birds also of birds have wings and hollow bones.Birds that can fly:☆ Birds flap their wings and (83) use air pressure to fly.☆ Birds are light enough to fly with the (84) help of hollow bones.Birds that can't fly:☆ Penguins are good at(85)swimming Amazing ☆Ostriches are fast ...
Just like other cats, the mightylion(Panthera leo) uses its tongue to groom its fur. Feline tongues are very effective combs; they're covered with tiny spines known as papillae, which are sharp, hollow and curved backward toward the cat's throat, according to a 2018 study in the journal...