Question

Explain the organisational levels of the human body and give TWO examples for each of the levels. ​

Answer 1

The human body is organized into several levels of increasing complexity, from the smallest and simplest to the largest and most complex. These levels include:

1. Chemical level: At this level, atoms and molecules come together to form the basic building blocks of life, such as proteins, carbohydrates, lipids, and nucleic acids. Examples of chemical level components include:

Oxygen and carbon atoms that combine to form carbon dioxide, a waste product of cellular respiration.

Amino acids, the building blocks of proteins, which combine to form enzymes that catalyze chemical reactions in the body.

2. Cellular level: Cells are the smallest living units of the body and are responsible for carrying out all the functions necessary for life. Examples of cellular level components include:

Red blood cells, which transport oxygen from the lungs to the rest of the body.

Neurons, which transmit electrical signals between the brain and the rest of the body.

3. Tissue level: Tissues are groups of cells that work together to perform a specific function. Examples of tissue level components include:

Epithelial tissue, which covers and protects the body's surfaces, such as the skin and lining of the digestive tract.

Muscle tissue, which contracts and allows for movement, such as the heart muscle and skeletal muscle.

4. Organ level: Organs are structures composed of two or more types of tissues that work together to perform specific functions. Examples of organ level components include:

The heart, which is composed of cardiac muscle tissue, connective tissue, and blood vessels, and is responsible for pumping blood throughout the body.

The liver, which is composed of epithelial tissue, connective tissue, and blood vessels, and is responsible for filtering and detoxifying the blood.

5. System level: Systems are groups of organs that work together to perform complex functions in the body. Examples of system level components include:

The digestive system, which is composed of organs such as the mouth, esophagus, stomach, and intestines, and is responsible for breaking down food and absorbing nutrients.

The nervous system, which is composed of the brain, spinal cord, and nerves, and is responsible for transmitting signals throughout the body and coordinating body functions.

Step-by-step explanation:

Answer 2

The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs,

Step-by-step explanation:

Higher levels of organization are built from lower levels. Therefore, molecules combine to form cells, cells combine to form tissues, tissues combine to form organs, organs combine to form organ systems, and organ systems combine to form organisms.

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