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In human lungs, gas exchange at alveoli occurs as oxygen enters blood and carbon dioxide exits via diffusion across thin alveolar and capillary walls.
In human lungs, gas exchange at alveoli occurs as oxygen enters blood and carbon dioxide exits via diffusion across thin alveolar and capillary walls.

Spinal nerves is essential conduits transmitting sensory and motor signals between the spinal cord and the rest of the body.
Spinal nerves is essential conduits transmitting sensory and motor signals between the spinal cord and the rest of the body.

An illustration of the human circulatory system showing arteries carrying blood from the heart, veins returning blood to the heart, and capillaries facilitating exchange of oxygen and nutrients.
An illustration of the human circulatory system showing arteries carrying blood from the heart, veins returning blood to the heart, and capillaries facilitating exchange of oxygen and nutrients.

The metamorphosis of the butterfly, egg, caterpillar, pupa, butterfly. From egg to caterpillar, chrysalis, to butterfly. Life cycle of butterfly Vector illustration
The metamorphosis of the butterfly, egg, caterpillar, pupa, butterfly. From egg to caterpillar, chrysalis, to butterfly. Life cycle of butterfly Vector illustration

A septic tank diagram shows the tank chambers, inlet, outlet, baffles, and drain field
A septic tank diagram shows the tank chambers, inlet, outlet, baffles, and drain field

Mosquitoes breed in stagnant water like ponds, puddles, and containers, making these ideal breeding places that can lead to rapid population growth.
Mosquitoes breed in stagnant water like ponds, puddles, and containers, making these ideal breeding places that can lead to rapid population growth.

Nuclear power uses uranium or plutonium for fission, generating heat to produce steam. This drives turbines, generating electricity, which is distributed through extensive power grids efficiently.
Nuclear power uses uranium or plutonium for fission, generating heat to produce steam. This drives turbines, generating electricity, which is distributed through extensive power grids efficiently.

Mosquitoes breed in stagnant water like puddles, ponds, and containers, spreading diseases like malaria, dengue, and Zika. Removing standing water helps prevent breeding and illness.
Mosquitoes breed in stagnant water like puddles, ponds, and containers, spreading diseases like malaria, dengue, and Zika. Removing standing water helps prevent breeding and illness.

Three different States of matter solid, liquid and gasuas state. Inter change of state of matter
Three different States of matter solid, liquid and gasuas state. Inter change of state of matter

A bomb calorimeter measures the heat of combustion of a substance. It burns a sample in a sealed chamber, and the heat released raises the water temperature, determining energy content.
A bomb calorimeter measures the heat of combustion of a substance. It burns a sample in a sealed chamber, and the heat released raises the water temperature, determining energy content.

Coronary angioplasty is a minimally invasive procedure to open blocked heart arteries using a balloon and stent, improving blood flow and reducing heart attack risk
Coronary angioplasty is a minimally invasive procedure to open blocked heart arteries using a balloon and stent, improving blood flow and reducing heart attack risk

Greenhouse effect and climate change from global warming outline concept
Greenhouse effect and climate change from global warming outline concept