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Desmon Brian
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Transport in animals refers to the movement of substances such as nutrients, gases, and waste products throughout the body. This process is essential for the survival of animals as it allows for the distribution of essential molecules to cells and the removal of waste products.

There are several mechanisms by which transport occurs in animals:

1. Circulatory system: In most animals, including humans, the circulatory system is responsible for transporting substances throughout the body. This system consists of the heart, blood vessels, and blood. The heart pumps blood through the blood vessels, delivering oxygen and nutrients to cells and removing waste products such as carbon dioxide.

2. Respiratory system: The respiratory system is responsible for the exchange of gases, such as oxygen and carbon dioxide, between the body and the environment. In animals, this process typically involves the intake of oxygen through the lungs or gills and the release of carbon dioxide.

3. Digestive system: The digestive system is responsible for breaking down food into nutrients that can be absorbed and transported throughout the body. Nutrients are absorbed in the small intestine and transported via the circulatory system to cells where they are used for energy and growth.

4. Excretory system: The excretory system is responsible for removing waste products from the body, such as urea and excess salts. These waste products are transported to the kidneys or other excretory organs for elimination from the body.

Overall, transport in animals is a complex process that involves the coordination of multiple organ systems to ensure the proper distribution of essential molecules and the removal of waste products.
Google Gemini AI
more than 4 weeks ago
Transport in Animals


Transport in animals refers to the movement of substances within their bodies. It is essential for maintaining homeostasis, distributing nutrients, and removing waste products.

Types of Transport Systems:

- Open circulatory system: Blood is not confined to vessels but flows freely through body cavities. Found in invertebrates like arthropods.
- Closed circulatory system: Blood is confined to blood vessels and flows in one direction. Found in vertebrates.

Components of a Closed Circulatory System:

- Blood: Transports substances throughout the body.
- Blood vessels:
- Arteries: Carry oxygenated blood away from the heart.
- Veins: Carry deoxygenated blood back to the heart.
- Capillaries: Smallest vessels where gas exchange occurs between blood and tissues.
- Heart: Muscular organ that pumps blood through vessels.

Types of Circulatory Circuits:

- Single circulation: Blood flows through the heart once before returning to the body. Found in fish.
- Double circulation: Blood flows through the heart twice before returning to the body. Found in mammals, birds, and reptiles.

Transport of Oxygen:

- Oxygen is bound to hemoglobin in red blood cells.
- Hemoglobin binds oxygen in the lungs and releases it in tissues.

Transport of Carbon Dioxide:

- Carbon dioxide dissolves in blood plasma or combines with hemoglobin.
- Most carbon dioxide is transported as bicarbonate ions in plasma.

Lymphatic System:

- A system of vessels that collects and returns interstitial fluid to the bloodstream.
- Plays a role in immune defense and fluid balance.

Other Transport Systems in Animals:

- Diffusion: Movement of substances across a concentration gradient.
- Active transport: Movement of substances against a concentration gradient using energy.
- Facilitated diffusion: Movement of substances across a membrane with the help of carrier proteins.
- Hormones: Chemical messengers that regulate various physiological processes, including transport.

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