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3 years ago

Infectious disease can be spread by which of the following

2 answers:

3 0

D) All the Above.

There are diseases that are carried from one person to another by sharing the same food, water and body fluids. If an infected person shares food with a non infected person the germs and bacteria that are present on his hands will carry the disease. There are several diseases that are water borne. These are spread through poor sewage systems or the water droplets in the air in which an infected person breathes. Body fluids can be the mucus from the nose of the flu, the spit of an infected person or sexual discharge that can cause STDs to a non infected person.

barxatty [35]3 years ago

3 0

D, food (salmonella) water (cholera) body fluid (stds)

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Why do so many plants have a green color?

Nataly_w [17]

Answer:

because they have chlorophyll as one of their many types of pigments.

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3 years ago

How are mitosis and meiosis similar?

timofeeve [1]

Answer:

Explanation:

They both produce new cells

Explanation:

Mitosis and meiosis both represent cell division that occur in humans and other animals. These cell division processes share many aspects, including the production of new cells and replication of genetic material.

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2 years ago

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Most planets have _____ but none has a _____ like Earth does

4vir4ik [10]

Answer:

Most planets have an atmosphere but none has a hydrosphere like Earth does.

Explanation:

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3 years ago

Four fishermen fished for the same amount of time in different ponds. Which catch most likely came from the pond with the highes

irina [24]

Correct Answer: B. Catch B

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3 years ago

Describe all muscle tissues, including cell shape, layers, intercellular connections,

zmey [24]

<h2>Description of muscle tissues. </h2>

Explanation:

There are three types of muscle tissue are cardiac, smooth, and skeletal.

1. Cardiac muscle tissue: It is located in the walls of the heart.

They appear striated.

Control is involuntary.

Function: To pump blood through the blood vessels in your body.

2. Smooth muscle tissue: It is located in walls of hollow visceral organs, except the heart.

They appear spindle-shaped.

Control is involuntary.

Function: To move food through the digestive tract.

To regulates air flow in lungs.

3. Skeletal muscle tissue: It occur in muscles which are attached to the skeleton.

They appear striated.

Control is voluntary.

Function: To support the body.

It makes bones and other body parts move.

Cell shape : There are different shapes of cells which are as follows:

1. Squamous 2.Cuboidal 3. Columnar 4. Polygonal 5. Stellate

6. Spheroid 7. Discoid 8. Fusiform 9. Fibrous.

Muscular layer: The muscular layer is present in many organs in the vertebrate body.

It is responsible for peristaltic movement in body.

There are two layers of muscle.

1. Inner 2. Outer layer.

Inner layer: The muscle of the inner layer is arranged in circular rings around the tract.

Outer layer: the muscle of the outer layer is arranged longitudinally.

Intercellular connections or junctions: These are the structures which provide adhesion and communication between cells.

There are mainly three types of junctions:

1. Tight junctions: It help to stop substances from leaking across a tissue.

2. Adhering junctions: It perform the function of cementing so as to keep neighbouring cells together.

3. Gap junctions: It facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.

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3 years ago