A group of scientists is studying the internal pets of cell.Which microscope is most appropriate for these scientists to use?

Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation

Soloha48 [4]

Answer:

The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.

Explanation:

In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.

Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.

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What two processes fuel the carbon cycle?

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D. cellular respiration and photosynthesis

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One of two taxonomic domains that include prokaryotes?

fomenos

Virus infection domain cell

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What is the sycamore tree

Greeley [361]

Sycamore trees (Platanus occidentalis) make handsome shade trees for large landscapes.

$Nice \: pic$

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Read 2 more answers

Improved bone regeneration through amniotic membrane loaded with buccal fat pad-derived MSCs as an adjuvant in maxillomandibular

muminat

Mesenchymal stem cells and HAM together may improve bone repair, especially in the horizontal dimension. Additionally, this technology lessens secondary bone resorption and the quantity of collected autogenous bone.

HAM:

Background: Human amniotic membranes (HAMs), a biological membrane with potential for cell therapy, osteogenesis, and healing, have come under the spotlight as a way to improve the results of treating bone abnormalities. The goal of the current study is to clinically evaluate the possibility of HAM loaded with stem cells from the buccal fat pad (BFSCs) as an osteogenic covering for only bone transplants to maxillomandibular bone lesions.
Materials and methods: The current investigation included nine patients with jaw bone abnormalities. Iliac crest bone graft with HAM covering (n = 5) and iliac bone grafts coated with HAM loaded with BFSCs (n = 4) were the two study groups that the patients were divided into. Cone beam computed tomography was carried out for radio morphometric characterization five months after the grafting and before the installation of the implant.
Results: The mean increase in bone width was found to be significantly greater in the HAM + BFSCs group ( $4.42$ ± $1.03$ mm versus $3.07$ ± $0.73$ mm, p < $0.05$ ). Further, the changes in vertical dimension were greater in the HAM + BFSCs group ( $4.66$ ± $1.06$ mm versus $4.14$ ± $1.03$ mm, p > $0.05$ ).

Learn more about HAM here brainly.com/question/25199209

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