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Basic Human Body Structure Units And Their Functions

717 words - 3 pages

1.1 Describe the four basic human body structure units and their functions
The four basic human body structures and their functions are as follows:
• Cells
• Tissues
• Organs
• Systems

Cells
Cells have been identified as the simplest unit of living matter that can maintain life.

A cell is the simplest and smallest unit of living matter and cells can live independently and can also reproduce themselves.

Cells exist in a varity of shapes and sizes including elongated, oval, and square, cells also have many different function.

A group of cells is called a tissue and the study of the structure, form of cells and tissue is called histology.

Tissues
Tissue is a ...view middle of the document...

In order for nervous tissue to perform all of these functions, cells within the nervous tissue needs to be able to communicate with each other by way of electrical nerve impulses

Muscular – tissue consists of cells that have the ability to shorten or contract in order to produce movement of the body parts. The cells are long and slender so they are sometimes called muscle fibres; these are usually arranged in layers that are surrounded by connective tissue.

Organs
Organs are the next level of organisation in the body. An organ is a structure that contains at least two different types of tissue functioning together for a common purpose. There are many different organs in the body: the liver, kidneys, heart, and skin. Skin is the largest organ in the human body.

Systems
Organ systems are composed of two or more different organs that work together to provide a common function. There are 10 major organ systems in the human body:

1. Skeletal
a. to provide support to the body
b. major organs are bones, tendons, ligaments, cartilage

2. Muscular
a. to provide movement
b. major organs are skeletal muscles and soft muscles

3. Cardiovascular
a....

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