The human cardiovascular system is considered closed because __________.a. blood is continuously circulated in the body.
b. blood provides nutrients to organs.
c. blood collects oxygen from the lungs
d. there are no holes for blood to enter or leave the system

Answers

Answer 1

Answer: The human cardiovascular system is considered closed because D. there are no holes for blood to enter or leave the system. Given that the blood doesn't really flow out of your body freely, it means that your system is closed. Otherwise, it would leave your body from every orifice, or even from your own skin through the pores.

Answer 2

Answer:

Answer:

its d lol

Explanation:

Related Questions

Pests have always been a nuisance for farmers. The use of pesticides dramatically improved the success of crops; however, it has been found that some insects are no longer harmed by traditional pesticides. How would Charles Darwin, the man behind the theory of evolution by means of natural selection, explain this phenomenon. A) Through random mutations in DNA, some pests developed a resistance to the pesticide. B) The chemicals used in pesticides today are not strong enough to kill unwanted pests. C) The pesticides used in the past caused unwanted mutations in pests causing them to mutate into superbugs. D) Through repeated exposure to the pesticides, the pests simply got use to to the chemicals and built up a resistance.
what is dyslexia?and how can a person like orlando bloom overcome it. (read an article about orlando bloom) and answer the question
mountains rift valleys and strike-slip faults are examples of land features that are formed by plate tectonics
Bugs effecting unimmunized children: respiratory
In which case will the object move due to an unbalanced force? A. Up = 300 N Right = 300 N Down = 300 N Left = 250 N B. Up = 450 N Right = 450 N Down = 450 N Left = 450 N C. Up = 300 N Right = 400 N Down = 300 N Left = 400 N D. Up = 550 N Right = 200 N Down = 550 N Left = 200 N

In fruit flies, the allele for red eyes, R, is dominant. Which genotype represents a white-eyed male fruit fly?

Answers

It would be "rr". This is due to the fact that recessive genes, like white-eyed, have to have a genotype with both recessive to show up.

The following choices are given;

A. XrXr. B. XrY. C. XRY D. XRXr

The answer is B. This is because the presence of the Y chromosome determines gender- which is male. In addition, it carries few genes than the X sex chromosome. Therefore, in this case, the X chromosome brings in the receive allele for eye color while the Y chromosome has no corresponding allele.

In most diploid organisms, they are two types of alleles for most genes which each on each set of chromosomes and at the same loci. In most cases, one allele is dominant over the other meaning that its presence masks the effect of the recessive allele. In the absence of the dominant allele, the recessive allele is expressed . Usually, the recessive gene is disadvantageous to the individual.

What type of white blood cell produced antibodies ?

Answers

Lymphocyte (Cell B)

Explanation

A lymphocyte is a type of white blood cell that is part of the immune system.
hope this helps please brainlist

You have just eaten a meal high in complex carbohydrates. Which of the following enzymes will help to digest the meal?A. gastrin
B. amylase
C. cholecystokinin
D. trypsin

Answers

If you have just eaten a mean high in complex carbohydrates, amylase is the enzyme that will help to digest the meal.

Amylase is an enzyme that help to digest the complex carbohydrates present in the meals, hence option B is correct.

Amylase is an enzyme or particular protein that aids in the breakdown of carbohydrates. Pancreas and salivary glands produce the majority of the amylase that is found in your body. It's normal to have a tiny quantity of amylase in blood and urine.

Glucose is created through your body's breakdown of carbs. The primary source of energy for the cells, tissues, and organs in your body is glucose, sometimes known as blood sugar.

Learn more about amylase, here:

brainly.com/question/29598093

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Fish, trees, and animals are important wildlife resources that we depend on for survival. Fish are a main source of food for many of the people in the world. Trees have been used to build and heat homes, make paper, and provide food for centuries. Humans hunt land animals such as deer, fox, antelope, and buffalo for food and other products. What can we do to protect wildlife resources so they will be around for future generations?

Answers

Answer:

harvest fast-growing trees, impose fishing limits, and impose laws to prevent poaching and illegal hunting

Explanation:

i got it right

We can limit fishing and hunting to certain seasons. This allows the population to increase and continue breeding, but we still get food. We can limit cutting down trees so that ecosystems can survive. Many species have lost homes due to deforestation. By cutting down only some trees in an area, we can still have wood to use, and we can save ecosystems.

Warm-up routines increase body temperature. What other effect do they have on the body?They increase blood flow.
They decrease blood flow.
They increase hydration levels.
They decrease hydration levels.

Answers

Warm up routines increase the blood flow in the body and also increases the temperature. It is always recommended that a person warms up their body before a work out.

increase blood flow .A

Krebs cycle occurs in the ___ of a eukaryotic cell. Question 27 answers matrix of the mitochondrion cristae membranes of the mitochondrion nucleus cytoplasm

Answers

The answer to the question stated above is matrix of the mitochondria or matrix of the mitochondrion
Krebs cycle occurs in the matrix of the mitochondria of a eukaryotic cell.
Additional information:
>matrix of the mitochondria is the fluid filled interior of the mitochondria.

Final answer:

The Krebs Cycle occurs in the matrix of the mitochondrion of a eukaryotic cell, which is a part of the process of cellular respiration, generating energy for the cell.

Explanation:

The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid (TCA) cycle, takes place in the matrix of the mitochondrion of a eukaryotic cell. This cycle is a crucial part of cellular respiration, the process by which cells generate energy. During the Krebs cycle, the pyruvate molecules derived from glucose are oxidized and, in turn, produce ATP (adenosine triphosphate), the main source of cellular energy, and other high-energy compounds. The matrix of the mitochondrion provides the necessary environment and enzymes for this cycle to occur effectively.