the body is upright, directly facing the observer, feet flat and directed forward. The upper limbs are at the body's sides with the palms facing forward ( the picture is blurry i cant choose an option )
This skin is known as the body membrane
That would be integumentary system
The answer for 17 is the germ theory of disease
The answer for 18 is increased soil erosion
The answer for 19 is bubonic plague
The answer for 20 is regenerate
The answer for 21 is historical food of the Incas
The answer for 22 is expansion of arable land
The answer for 23 is microorganisms
The answe for 24 is pollution
