Specific excretory organs are absent in unicellular organisms belonging to the<u> phylum Porifera.</u>
The organisms of the phylum Porifera are classified under the kingdom Animalia and they lack specific organs in their bodies.
The word "Porifera" refers to pore-bearing organisms.
These animals have loosely organized cells and are found in freshwater marine ecosystems.
On their body, a large number of pores - Ostia - are present which perform various functions such as excretion.
However, respiratory gases and waste materials are exchanged through a diffusion process.
Moreover, in them, reproduction takes place through fragmentation and budding.
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Answer:
FALSE
Explanation:
The heart is a muscular four-chambered organ, which is responsible for pumping blood through the blood vessels of circulatory system.
Firstly, the blood enters into right atrium of the heart and then passes to right ventricle via tricuspid valve. <u>The right ventricle of the heart then contracts and pushes the blood to pulmonary artery via </u><u>pulmonary semilunar valve</u><u>.</u>
Crohn's disease
**An anorectal abscess is common in clients with Crohn's disease.
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Answer:
The AHA suggests an added-sugar limit of no more than 100 calories per day (about 6 teaspoons or 24 grams of sugar) for most women and no more than 150 calories per day (about 9 teaspoons or 36 grams of sugar) for most men. There's no nutritional need or benefit that comes from eating added sugar.
Explanation:
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