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Transcript
The cell wall is found in plant cells, but not in animal cells. This is the outermost layer in the
plant cell. It is stiff, rigid, nonliving, and made of cellulose. It provides support so that the
plant can grow tall and protection. Some materials like water, oxygen, and carbon dioxide
can pass through it.
The cytoplasm is a thick, jellylike substance found in both plant and animal cells filling the
space between the nucleus and the cell membrane. It contains and supports the cell
organelles. The cytoplasm is constantly in motion.
The cell membrane is found in both plant and animal cells. It is the outermost layer in the
animal cell and is found just inside the cell wall in the plant cell. The animal cell membrane
contains cholesterol, but the plant cell does not. It has pores and is selectively permeable
allowing the movement of certain substances into and out of the cell. This helps maintain
homeostasis in the cell. The cell membrane also protects and supports the cell.
The nucleus is a large, oval structure found in both plant and animal cells. It controls and
regulates all cell activities. It contains genetic material.
The mitochondrion is a bean-shaped structure found in both plant and animal cells. The
mitochondria (plural) break down sugars and release energy for use by the cell. It has inner
membranes or cristae. Cells with high activity levels contain more mitochondria, such as
muscle cells.
The vacuole is a round, fluid-filled sac found in both plant and animal cells. Plants usually
have a few large vacuoles, while animal cells have smaller vacuoles, if any. It stores food,
water, and other materials for use by the cell. Wastes may also be stored in vacuoles.
A chloroplast is found in plant cells, but not in animal cells. Chloroplasts are oval-shaped,
green structures usually containing chlorophyll, a green pigment. They use the sun's energy
to make food for the plant through a process called photosynthesis. The photograph at the
right was taken of Elodea, a water plant. All of the darker spots in the cell are chloroplasts!
The lysosome is a small, round structure common in animal cells, but not usually found in
plant cells. The lysosome is involved in digestive activities, including breaking down large
food molecules into smaller ones and the digestion of old cell parts.
The nuclear membrane is a selectively permeable membrane that is found in both plant and
animal cells. It surrounds the nucleus and controls movement of materials into and out of the
nucleus.
The ribosomes are structures found in both plant and animal cells. They are small bodies
that are attached to the endoplasmic reticulum or free bodies. Ribosome produces proteins.
The endoplasmic reticulum (E. R.) is found in both plant and animal cells. It is a network
of tubes or membranes that carries materials though the cell.
Animal Cell
Cell Organelles