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a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation.
an open space in a town or city, where people can breathe fresher air.
each of a pair of globular organs in the head through which people and vertebrate animals see.
a biological community of interacting organisms and their physical environment.
is an individual form of life that is capable of growing and reproducing, and have one or more cells.
Is a place where an organism makes its home.
The invasion and growth of germs in the body.
refers to any process that living things use to actively maintain fairly stable conditions necessary for survival.
is the branch of biology that studies the animal kingdom
is the hunting of wild animals in their natural state and habitat by means of a trained bird of prey.
a branch of zoology dealing with the study of birds.
is the science of plant life and a branch of biology.
a flattened structure of a higher plant, typically green and blade-like, that is attached to a stem directly or via a stalk.