What is the excretory structure of earthworm?
Earthworms (annelids) have slightly more evolved excretory structures called nephridia, illustrated in Figure 2b. A pair of nephridia is present on each segment of the earthworm. They are similar to flame cells in that they have a tubule with cilia. Excretion occurs through a pore called the nephridiopore.
How does earthworms excrete waste?
In earthworm carbon dioxide and nitrogenous wastes are the main waste materials. The carbon dioxide is excreted out from the body through its moist skin by the process of diffusion. The nitrogenous wastes are excreted out of the body by special excretory organs called nephridia (singular nephridium).
What primary structures are involved in the excretion process?
The primary excretory organs in the human body are the kidneys, ureters and urinary bladder, involved with the creation and expulsion of urine. Through these organs, much of the nitrogenous waste of the body, especially urea, is expelled.
Which structure is responsible for excretion?
Kidneys. The paired kidneys are often considered the main organs of excretion. The primary function of the kidneys is the elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine .
What is the name of excretory structures of flatworms?
(2) Flatworms have an excretory system that consists of two tubules. The cells in the tubules are called flame cells; they have a cluster of cilia that propel waste matter down the tubules and out of the body. (3) Annelids have nephridia which have a tubule with cilia.
What is the function of excretion?
The physiological process by which an organism disposes of its nitrogenous by-products is called excretion. The mechanisms for that process constitute the excretory systems, particularly such organs of vertebrate animals as elaborate and complicated as the kidney and its associated urinary ducts.
What is the process of excretion?
Excretion, the process by which animals rid themselves of waste products and of the nitrogenous by-products of metabolism. Through excretion organisms control osmotic pressure—the balance between inorganic ions and water—and maintain acid-base balance.
What are examples of excretion?
The matter, such as urine or sweat, that is so excreted. Excretion is defined as the process of expelling waste matter, or the waste matter expelled by this process. When a person goes to the bathroom to urinate, this is an example of excretion. Urine is an example of excretion.
Why is it called excretion?
These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.
What are the three forms of excretion?
They are: Ammonotelism (Type of excretion- ammonia) Ureotelism (Type of excretion – urea) Uricotelism (Type of excretion – uric acid)
What is need for excretion?
Removal of metabolic wastes from body is called excretion. Many waste products are created in the body during various metabolic processes. These substances would prove harmful and even toxic if they are not removed from the body on time. Hence, there is a need for excretion.
What does excrete mean?
transitive verb. : to separate and eliminate or discharge (waste) from the blood, tissues, or organs or from the active protoplasm.
What is excretion in simple words?
: the act or process of passing waste from the body : the process of excreting waste. : waste passed from the body : excreted matter.
Does excrete mean to get rid of?
When a person or animal excretes waste matter from their body, they get rid of it in feces, urine, or sweat.
Is poop excreted?
The rectum ampulla stores fecal waste (also called stool, or poo) before it is excreted. As the waste fills the rectum and expands the rectal walls, stretch receptors in the rectal walls stimulate the desire to defecate.
What do lungs excrete?
The lungs in the respiratory system excrete some waste products, such as carbon dioxide and water. The skin is another excretory organ that rids the body of wastes through the sweat glands.
Can you live without lungs?
The lungs are key organs in the human body, responsible for bringing oxygen into the body and helping get rid of waste gases with every exhale. Though having both lungs is ideal, it is possible to live and function without one lung. Having one lung will still allow a person to live a relatively normal life.