The answer is skin
The first line of defence is your innate immune system. Level one of this system consists of physical barriers like your skin and the mucosal lining in your respiratory tract. The tears, sweat, saliva and mucous produced by the skin and mucosal lining are part of that physical barrier, too.
Answer:
YES
Explanation:
When they first hit the ground, the impact makes them forget about the pain. Some people might not feel the pain due to them hitting their head at a certain spot which is dangerous. Breaking a bone is like cracking a part of your body, but instead of stopping the crack it continues till you feel a hard like object penetrating the inside of your skin.
Answer: d. none of the above
Explanation:
The respiratory membrane is the membrane which separates the air inside the alveoli from the pulmonary capillaries. The types of respiratory membranes includes the alveoli membrane, the capillary membrane and the basement membrane. The respiratory membrane is usually very thin. But it becomes thick due to the increase in the fluid content, which actually forces the gases to diffuse through the membrane and the fluid. Also the pulmonary diseases can also cause the membrane to become thick.
Autism spectrum disorder (ASD) is a neuro developmental disorder characterized by deficits in social communication and social interaction and the presence of restricted, repetitive behaviors.
What is ASD disorder?
Autism spectrum disorder (ASD) is a neurological and developmental disorder that affects how people interact with others, communicate, learn, and behave. Although autism can be diagnosed at any age, it is described as a “developmental disorder” because symptoms generally appear in the first two years of life.
Why is autism a spectrum disorder?
Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. Some people with ASD have a known difference, such as a genetic condition. Other causes are not yet known. Scientists believe there are multiple causes of ASD that act together to change the most common ways people develop
Learn more about Autism Spectrum Disorder:
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