Integumentary System
Chapter 5
Digestive system provides nutrients needed for energy, growth,
and repair; supplies fats that provide insulation in the dermis
and subcutaneous tissue
The skin synthesizes vitamin D needed for calcium absorption
from the intestine; protects by enclosure
Skeletal System
Chapters 6–8
Digestive system provides nutrients needed for energy, growth,
and repair; absorbs calcium needed for bone salts
Skeletal system protects some digestive organs by bone; cavities
store some nutrients (e.g., calcium, fats)
Muscular System
Chapters 9–10
Digestive system provides nutrients needed for energy, growth,
and repair; liver removes lactic acid, resulting from muscle
activity, from the blood
Skeletal muscle activity increases motility of GI tract
S Y S T E M C O N N E C T I O N S
Homeostatic Interrelationships Between the
Digestive System
and Other Body Systems
Access more System Connections in the Study Area at
www.masteringaandp.com
.
Nervous System
Chapters 11–15
Digestive system provides nutrients needed for normal neural
functioning; nutrient signals influence neural regulation of
satiety
Neural controls of digestive function; in general,
parasympathetic fibers accelerate and sympathetic fibers inhibit
digestive activity; reflex and voluntary controls of defecation
Endocrine System
Chapter 16
Liver removes hormones from blood, ending their activity;
digestive system provides nutrients needed for energy, growth,
and repair; pancreas, stomach, and small intestine have
hormone-producing cells
Hormones and paracrines help regulate digestive function
Cardiovascular System
Chapters 17–19
Digestive system provides nutrients to heart and blood vessels;
absorbs iron needed for hemoglobin synthesis; absorbs water
necessary for normal plasma volume; liver secretes bilirubin
resulting from hemoglobin breakdown in bile and stores iron
for reuse
Cardiovascular system transports nutrients absorbed by
alimentary canal to all tissues of body; distributes hormones of
the digestive tract
Lymphatic System/Immunity
Chapters 20–21
Digestive system provides nutrients for normal functioning;
lysozyme of saliva and HCl of stomach provide nonspecific
protection against bacteria
Lacteals drain fatty lymph from digestive tract organs and
convey it to blood; Peyer’s patches and lymphoid tissue in
mesentery house macrophages and immune cells that protect
digestive tract organs against infection; plasma cells provide IgA
in digestive tract secretions
Respiratory System
Chapter 22
Digestive system provides nutrients needed for energy
metabolism, growth, and repair
Respiratory system provides oxygen to and disposes of carbon
dioxide produced by digestive system organs
Urinary System
Chapters 25–26
Digestive system provides nutrients for energy, growth, and
repair
Kidneys transform vitamin D to its active form, which is needed
for calcium absorption
Reproductive System
Chapter 27
Digestive system provides nutrients for energy, growth, and
repair and extra nutrition needed to support fetal growth
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