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3 years ago

A gland is a group of cells or an organ that

Biology

1 answer:

olganol [36]3 years ago

6 0

An organ or group of specialized cells in the body that produces and secretes a specific substance, such as a hormone

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The chemical name for sand Is silicon dioxide. The 2 elements found in a sample of the sand are blank and blank

Nuetrik [128]

Answer: The two elements found in sand are silicone and oxygen.

Explanation:

Sand is a granular substance that contain different smaller pieces of rocks and minerals. It is formed fromm weathering of rocks or breakdown of larger particles of rock into smaller pieces. Silicon dioxide or silica is a compound found in sand and also glass. Silicon dioxide is the chemical formula of sand. Silicon dioxide is formed when silicone reacts with two molecules of oxygen to form silicon dioxide. The major elements in sand is silicone and oxygen.

4 0

3 years ago

Read 2 more answers

The swelling and pain associated with inflammation are caused by the a. destruction of bacteria by white blood cells. b. expansi

777dan777 [17]

Swelling and pain is mainly due to the expansion of local blood vessles to make them more permeable to white blood cells

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3 0

3 years ago

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In observing epithelial cells under a microscope, the cells are arranged in a single layer and look tall and narrow, and the nuc

KonstantinChe [14]

Answer:

Tall, narrow cells arranged in a single layer correspond to a simple columnar epithelial tissue.

Explanation:

According to the arrangement of cells, epithelial tissues can be classified as:

- Simple epithelium, formed by a single cellular layer which is in contact with the basement membrane

- Stratified epithelium, formed by two or more cellular layers. The cellular shape and high vary from one layer to the other. In classification, only the superficial layer is considered.

- Transitional epithelium. In this case, the epithelial cells vary in shape and size allowing the tissue to stretch.

Classification of epithelial tissues according to the cell shape:

- Squamous epithelium: Epithelial cells are flat and thin. Their nucleus is narrow and centered. This epithelium can be found in endothelium, mesothelium, pericardium, and peritoneum.

- Cuboidal epithelium: Epithelial cells are cubic shaped: their width, length and high are about equal. Their nucleus is rounded and centered. This epithelium can be found in kidney tubules, Malpighi tubules, thyroid gland, salivary glands, and pancreas.

- Columnar epithelium: Epithelial cells are tall, rectangular and/or column-shaped, longer than width. Their nucleus is ovoid and near to the base. This epithelium can be found in the stomach, intestine, duct of glands, Fallopian trumps, etc. Their functions are related to secretion, absorption, protection, motility.

Types of epithelium tissue:

- Simple squamous epithelium

- Simple cuboidal epithelium

- Simple columnar epithelium

- Stratified squamous epitheliums

- Stratified cuboidal epitheliums

- Stratified columnar epitheliums

- Transitional epithelium

5 0

3 years ago

Can anyone help me with this please

dangina [55]

Answer:

Explanation: the organism is good at the function it serves in it's habitat

4 0

3 years ago

The variables that stay the same to keep the experiment fair. Ex same amount of sunlight

Ghella [55]

Control variable.
hope this helps :)

3 0

2 years ago