Tissue Types

Module 2 Lesson 1 Assignment by Mikayla Crowder

Epithelial Tissue

This tissue primarily functions to protect, absorb, and to filter and excrete. It is found on organ surfaces and outside the body. The type pictured to the right is simple squamous, found in the capillaries of lungs to filter the gases exchanged within.

The form of simple epithelial cells allow for easy diffusion and excretion throughout the body. When epithelial cells are stratified, it allows for it to protect the body with it's multiple layers.

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Connective Tissue

Connective tissue functions to protect organs, bear weight, insulate and store fat, transport substances through blood, provide framework, and connect structures. Pictured to the right is bone connective tissue which is used to support, protect, store minerals, and produce blood cells.

The extracellular matrix found in all connective tissues allows for extra support and the specialized cells found in connective tissue allows for it perform it's many different functions.

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Muscle Tissue

Muscle tissue allows for movement and body support. The skeletal muscle pictured is the only voluntary muscle tissue types and it is found attached to bones to aid in body movement.

Muscle tissue is the only kind that has the ability to contract and retract, allowing it to aid in movement.

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Nervous Tissue

Nervous tissue is found in the brain, spinal cord, and nerves. It is used to generate and transmit nervous impulses from the body to the organs. It also insulates and protects neurons.

Neurons making up the nervous tissue allow for the messages needing to be transmitted from one art of the body to an organ to be sent quickly. Without neurons, messages would not be sent quickly enough and organisms could potentially be harmed.

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The best tissue for movement is muscle tissue. Muscle tissue has the ability to contract and relax, and necessary ability to aid in function. It's best that it can be found throughout the body because movement is needed not only for our limbs, but also for our heart to pump blood and our digestive system to pass food through. Other tissues simply would not have needed qualities to allow for such movement.