Chapter 12 Vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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bird | an endothermic vertebrate that has feathers and a four-chambered heart; lay eggs.
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contour feather | one of the large feathers that give shape to a bird's body.
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down feathers | short, fluffy feathers that are specialized to trap heat and keep the bird warm.
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crop | an internal storage tank for storing food inside the body after swallowing it.
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gizzard | a thick-walled muscular part of the stomach that squeezes and grinds the partially digested food.
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lift | an upward force that causes the bird to rise.
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mammal | endothermic vertebrates that have a four-chambered heart and skin covered with fur or hair.
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mammary glands | organs that produce milk inside the mother's body.
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diaphragm | a large muscle that is located at the bottom of the ribs.
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monotreme | egg-laying mammals.
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marsupial | mammals whose young are born at an early stage of development and they usually continue to develop in a pouch on their mother's body.
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gestation period | the length of time between fertilization and birth.
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placental mammal | develops inside its mother's body until its body systems can function independently.
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placenta | an organ in pregnant female mammals that passes materials between the mother and the developing embryo.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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