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Mammals

Bynum, Sosa, Vitalich P. 2

Chapter 43 Vocabulary

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Across
1.In some herbivorous animals, a sac usually found at the beginning of the large intestine that acts as a fermentation chamber for lan materials.
4.The process of using reflected sound waves to find objects; used by animals such as bats.
7.In hominids, the condition of being adapted to walk primarily upright on two legs.
10.A member of the family Hominidae of the order Primates; characterized by bipedalism, relatively long lower limbs, and lack of a tail; examples include humans and their ancestors.
13.An ape whose face has little hair and hose hands have nails and complex fingerprints, such as an orangutan gorilla, or chimpanzee.
14.In animals, the characteristic of maintaining a high, constant body temperature through regulation of metabolism and heat loss.
16.A large tooth that is located in the back of the mouth and that i used to grind and crush food.
18.An aquatic, fin-footed, carnivorous animal, such as a sea lion, walrus, or seal.
20.A mammal that nourishes its unborn offspring through a placenta inside its uterus.
21.A mammal that lacks a true placenta and gives birth to relatively undeveloped young, and then carries and nourishes the young in a pouch.
22.The structure that attaches a developing fetus to the uterus and that enables the exchange of nutrients, wastes, and gases between the mother and the fetus.
23.One of a subgroup of primates that includes monkeys, apes, and humans.
26.One of the eight teeth that are located between the molars and the canines.
27.A lineage of amniotes that gave rise to mammals; characterized by skills that have a single opening in a bone behind the eye socket.
28.A hoofed animal.
Down
2.A sharp tooth located on either side of both jaws.
3.The thin plates of keratin that hang from the mouth of some whales; used to filter out water but to retain solids when whales feed.
5.In primates, as thumb that can touch and move in opposition to the other fingers of the hand.
6.Any of the four cutting teeth located between the canines in the upper and lower jaws.
8.A gland that is located in the chest of a female mammal and that secretes milk.
9.A appendage that can grasp objects, as in a primate’s hand, foots or tail.
11.A dome-shaped muscle that is attached to the lower ribs and that functions as the main muscle in respiration.
12.A lineage of synapsids that were abundant during the late Permian period and gave rise to mammals; characterized by limbs positioned directly beneath the body; some may have been endothermic.
15.One of a subfamily of early hominids that lived between 4.2 million and 1 million years ago; includes the genus Australopithecus and possibly the genus Paranthropus.
16.A mammal that lays eggs.
17.In egg-laying amniotes, a reproductive method in which the female’s reproductive tract encloses each egg in a tough, protective shell.
19.An organism whose offspring develop within the mother’s body and are born alive.
24.The first of the four compartments in the stomach of a ruminant animal.
25.A member of the genus Homo of the family Hominidae; includes modern humans and closely related extinct species.

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