Yes the heart is the major organ of the circulatory system it's main function is to propel blood throughout the body.
Answer: primero di que animales hay
Explanation:
Answer:
is used by commercial airplanes
Explanation:
The stratosphere is used by most commercial airplanes. This is because this layer of earth is stratified and more stable.
- The lowest level of the atmosphere is the troposphere.
- This layer is where all the bulk of the atmospheric gases are domiciled.
- Weather conditions occur here.
- This layer is not safe for flight due to its turbulent nature.
- The ionosphere is responsible for the transmission of radio signals around the earth.
- The earth's weather occurs in the region of the troposphere.
The answer is; A
This model hypothesizes how life started during the early conditions of the earth which were hot and filled with greenhouse gases in its atmosphere about 4 billion years ago. It is explained by the theory of spontaneous generation where organic molecules were created from inorganic molecules spurred from energy from lightning. These organic molecules filled the water bodies and chemically arranged themselves, over time, into primordial life.
Answer:
1. Sympathetic
2. Parasympathetic
Explanation:
The sympathetic nervous system is activated when the person experiences any stress conditions. This nervous system stimulates the release of stress hormones from the adrenal gland and generates flight or fight response. There are an increased heart rate and breathing rate to increase the oxygen supply to skeletal muscles.
Once the person comes out of the stress conditions, the parasympathetic nervous system is activated which slows down the physiological responses generated by the sympathetic system. The activated parasympathetic nervous system stimulates the digestion and absorption of nutrients.