Raneses 1
Annejelyn Raneses
BIOL 223-005
The Case of Will Smithers: To Exhume or not Exhume, that is the Question
1.
b. Different tissues share a discrete population of functionally and structurally related
cells and a surrounding material called the extracellular matrix.
2.
A tissue is when two or more cells group together to form a specific function for the
body. An organ is a group of two or more tissues that come together as a structure that
performs a specialized task. In relation to the levels of body organization, tissues make up
the third tier and consist of when cells similar in shape, size, and function combine to
perform a function together. The organ level is the fourth tier in the body’s organization
and appear when similar tissues form together and perform a function.
Epithelial tissues is made to cover the body’s surfaces and internal cavities to protect
from stress and other injuries. They also secrete sweat, saliva, and certain hormones
through the glands they form. The cells in epithelial tissue are packed tight in layers with
no ECM visible.
Connective tissues bind, support, and protect the body’s internal features. They also aid in
the transportation of substances throughout the body, referring to blood. These tissue, in
contrast to epithelial tissue, have a very prominent ECM and have its cells found
sparingly throughout the rest of the tissue.
Muscle tissues are designed to contract, voluntary or involuntary, and do not have much
ECM between its cells.
Nervous tissues are made to generate, send, and receive electrical signals throughout the
body. These tissues are composed of unique cells with a cell body, axon and dendrite.
3.
a. Epithelial tissue only provides a physical barrier against invading organisms, as there
are no immune system cells associated with this tissue type.
