Biology, 23.05.2020 18:02 srgrace9948

The illustration below shows simplified models of two different circulatory systems.

Diagram at left shows a single loop of blood vessels, including a heart with 1 ventricle and 1 atrium and two capillary beds. At right, a heart with 2 ventricles and 2 atria, and a double loop of blood vessels to two capillary beds.

In both models, which is one way that the real circulatory system is more complex than the model shows?

A. The heart has several additional chambers for receiving and pumping blood.
B. Arteries and veins divide and branch many times to serve all of the body capillaries.
C. A capillary bed interfaces with the digestive system, where gas exchange occurs.
D. Twenty wide arteries extend directly from the heart, each carrying blood to a separate capillary bed.

The illustration below shows simplified models of two different circulatory systems. Diagram at left

Answers: 1

Show answers

Another question on Biology

Biology, 21.06.2019 20:00

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

Answers: 1

Answer

Biology, 22.06.2019 00:10

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

Answers: 3

Answer

Biology, 22.06.2019 13:00

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?

Answers: 1

Answer

Biology, 22.06.2019 15:20

Which is a kingdom? protistachordataprokarya mammalia

Answers: 2

Answer

You know the right answer?

The illustration below shows simplified models of two different circulatory systems.

Dia...

Questions