1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vladimir1956 [14]
4 years ago
5

Which structure of the heart acts like an automatic door that closes once blood enters a chamber and forces it to exit in the pr

oper direction. A. Atria C. Arteries B. Valves D. Ventricles
Biology
2 answers:
AVprozaik [17]4 years ago
8 0
Valves, they are like flaps of muscle that keeps the blood in its place util its ready to be pumped along.

Alenkinab [10]4 years ago
6 0

Answer:

anwser is B: valves

Explanation:

You might be interested in
The pectoral girdle consists of the:
nata0808 [166]

The correct answer is C. Clavicle and scapula

Explanation:

The pectoral girdle, also called the shoulder girdle refers to a set of bones that connect the arm to the rest of the skeleton. In human beings and many other species, the pectoral girdle consists of the clavicle that is a long bone that goes from the shoulder to the sternum and the scapula that is a flat bone and goes from the upper zone of the arm to the clavicle. Additionally, in some species, the shoulder girdle includes a third bone called coracoid. According to this, the pectoral girdle consists of the clavicle and the scapula.

7 0
3 years ago
What is the driving force for the movement of lithospheric plates ?
Pavlova-9 [17]
The driving force for the movement of lithosphere plates is convection currents. These currents are found in the inner core of the earth and take the heat from the core to the lithosphere. Tectonic plates are able to move because of the relative density of oceanic lithosphere and the relative weakness of the asthenosphere. Dissipation of heat from the mantle is acknowledged to be the original source of energy driving plate tectonics. The current view, although it is still a matter of some debate, is that excess density of the oceanic lithosphere sinking in subduction zones is the most powerful source of plate motion.
4 0
4 years ago
Saclike membranes that contain chlorophyll are known as
Dvinal [7]

Explanation:

offices s4x5svu0nsisnubsubsindind9s9?z0?pw?om2ibeunsimz

3 0
3 years ago
Read 2 more answers
Which structure does not belong to the pulmonary circuit?
12345 [234]

Answer:

which structure does not belong to the pulmonary circuit?

A) left ventricle

B) right atrium

C) right ventricle

D) pulmonary trunk.

please help and define the difference in pulmonary circuit and pulmonary circulation. thanks

4 0
3 years ago
Where are the coastal areas located that are unlikely to harbor a kelp forest ecosystem
arlik [135]
King james
was the unlikely place wear thay wers
8 0
3 years ago
Read 2 more answers
Other questions:
  • List 4 cell organelles and their function (what they do) in the eukaryotic cell.
    5·1 answer
  • What is the double layered sac that surrounds the heart
    7·2 answers
  • Which factor is most important in determining a protein's optimum ph?
    15·1 answer
  • What animal is best adopted to the life in a savanna biome? A. Bison B. Caribou C. Llama D. Zebra
    9·1 answer
  • Scientists discovered that the inner core of Earth is a solid. Explain what evidence supports this thinking. Be sure to include
    12·2 answers
  • How does the circulatory system interact with the digestive system
    13·2 answers
  • Jacinta realizes she is starting to lose her battle with lung cancer. she keeps praying, "i just want to live long enough to see
    11·1 answer
  • True or False<br> An increase in cell size results in an increase in surface area to volume ratio.
    15·1 answer
  • Explain what is happening below​
    10·2 answers
  • Study Island
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!