A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.

The cell wall is the protective, semi-permeable outer layer of a plant cell. A major function of the cell wall is to give the cell strength and structure, and to filter molecules that pass in and out of the cell. A cell is the smallest part of an organism that still contains that organism’s elements.

Cell wall is wall present in plant cell, but not in animal cell. It is an outer rigid, protective and supportive covering of plant cell. It provides a definite shape to the plant cell. It also protects cell membrane and internal structures from the attack of Pathogens and Mechanical injury.

Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.

The overall size of any animal or organ depends on the number and size of its cells. The average animal cell size is approximately 10–20μm in diameter. Such small size re- sults in a large surface area-to-volume ratio that allows for efficient transport of materials in and out of cells.

cells are basic building blocks of all living things the human body is composed of trillions of cells they provide structure for the body take in nutrients from food convert those nutrients into energy and carry out specialised functions.

They provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.

The largest cells is an egg cell of ostrich. The longest cell is the nerve cell. The largest cell in the human body is female ovum.

Cells must perform 11 main functions in order to support and maintain life: absorption, digestion, respiration, biosynthesis, excretion, egestion, secretion, movement, irritably, homeostasis, and reproduction.

The 5 functions common to all cells include nutrient uptake, reproduction, growth, waste removal and reacting to external changes. All living things are made up of cells, which serve as the basic building blocks of life, and all cells have a purpose in a living organism.

Terms in this set (6)

• Molecule Transport. Helps MOve food, water, or something across the membrane.
• Act as enzymes. Controls metabolic processes.
• Cell to cell communication and recognition. so that cells can work together in tissues.
• Signal Receptors.
• intercellular junctions.
• Attatchment to the cytoskeleton and ECM.

Cell Types

• Stem cells. Stem cells are cells that are yet to choose what they are going to become.
• Bone cells. There are at least three primary types of bone cell:
• Blood cells. There are three major types of blood cell:
• Muscle cells.
• Sperm cells.
• Female egg cell.
• Fat cells.
• Nerve cells.

These findings led to the formation of the modern cell theory, which has three main additions: first, that DNA is passed between cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within …

All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms….Modern version

• Energy flow occurs within cells.
• Heredity information (DNA) is passed on from cell to cell.
• All cells have the same basic chemical composition.

Cells provide six main functions. They provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.