A primary component of the
endothelial system are the
An important type of cell found within these tissues is the
cyte. These cells
signal other types of white blood cells to
ze foreign materials. These tissues
are more important in the (child) (adult).
The aggregate of lymphoid tissue at the beginning of the pharynx are called
Peyer's patches might be considered the "
s" of the small intestines.
At the beginning of the large intestine, at the inferior end of the cecum, is the
, which might be considered the"
" of the large intestine.
Lining the sinusoids of the liver and removing harmful substances from the blood
's cells. These cells are also considered to be part of the
During nursing, the initial secretion of the mammary glands is called c
Although this secretion lacks nutrients, it is loaded with
s. These provide the
infant with its primary p
n for the first 6
s of life.
Later, if the infant has an upper respiratory infection, the mammary gland will
produce the appropriate
s. This is because of a
x of fluid into the
milk ducts of the mammary gland as the infant sucks.
Required in very small quantities from outside the body are substances called
s. These can be considered in two major categories-- _____-soluble and
Water-soluble vitamins include the __-complex vitamins, vitamin
, and others.
There is a daily requirement for water-soluble vitamins because they are continuously
excreted with the
On the other hand, fat-soluble vitamins accumulate in the
of the body.
An important nondigestible food material is
ose, commonly referred to as
r" or "
k." Other undigested materials may be because of the consumption
t quantities of food. Undigested food materials enter the large intestines
through the ile