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.
If you need to learn more about excretory organs click here:
brainly.com/question/28302813
#SPJ4
Answer:
TRUE
Explanation:
In the cardiovascular system, the blood flows from <u>high pressure to low pressure.</u>
In the ventricular ejection phase, when the muscles of the ventricles contract, the<u> pressure gradient in ventricles rises</u>. This increases in the <u>pressure in the ventricles exceeds the pressure in the pulmonary artery </u>and aorta, thus opening pulmonary and aortic valves and ejecting the blood from the heart.
Answer:
B. "If you will excuse me for a moment, I will let the pharmacist answer your questions about this prescription."
Explanation:
I calculated it logically
On the flanks of the body, medial to the rectus femoris, the abdominal wall is composed of three layers. The external oblique muscles form the outermost layer, while the internal oblique muscles form the middle layer, and the transverses abdominus forms the innermost layer.
The washing of hands of food workers after using the toilet helps prevent feacal oral transmission of foodborne diseases.
<h3>Meaning of fecal oral transmission of diseases.</h3>
Fecal oral is a process of disease transmission through the feaces of an infected food worker to a non infected individual or customer.
This transmission occurs when food workers fail to sanitize properly after using the rest room
In conclusion poor sanitation is dangerous and we all must learn to wash our hands after using the toilet.
Learn more about Disease transmission : brainly.com/question/9286629
#SPJ1
