Department ofDepartment of Human AnatomyHuman Anatomy

The functional The functional Anatomy of the Anatomy of the Nervous Nervous (peripheral), (peripheral), Endocrine, Endocrine, Lymphatic and Lymphatic and Immune SystemsImmune Systems

The State Medical and Pharmaceutical University “Nicolae Testemitanu”

Lecturer Globa Lilian

Coordination and Regulation of Coordination and Regulation of Body SystemsBody Systems

◦Nervous system. Conducts nerve impulses maintaining

homeostasis (electrochemical).

◦Endocrine system. Serves as messaging system maintaining

homeostasis (chemical).

Nervous & Endocrine SystemsNervous & Endocrine Systems

Nerve PlexusesNerve Plexuses

◦Plexus = “braid”◦Nerves supplying the limbs form

plexuses when they leave the spinal cord Cervical Brachial Lumbosacral

Lumbar Sacral

Spinal NerveSpinal Nerve

Nerve PlexusesNerve Plexuses

Cervical PlexusCervical Plexus

◦Formed by spinal nerves C1 – C5 Nerves innervate the neck and shoulder

region Phrenic nerve to the diaphragm

Cervical PlexusCervical Plexus

Brachial PlexusBrachial Plexus

◦Formed by spinal nerves C5 – C8 and T1 Nerves innervate the arm and shoulder

Brachial PlexusBrachial Plexus

Human Anatomy, 3rd editionPrentice Hall, © 2001

Brachial Brachial

PlexusPlexus

Human Anatomy, 3rd editionPrentice Hall, © 2001

Lumbosacral Lumbosacral

PlexusPlexus

Human Anatomy, 3rd editionPrentice Hall, © 2001

Lumbar PlexusLumbar Plexus

◦Formed by spinal nerves T12 and L1 – L4. Innervates the medial and anterior

portions of the thigh and lower abdominal region

Lumbar PlexusLumbar Plexus

Human Anatomy, 3rd editionPrentice Hall, © 2001

Sacral PlexusSacral Plexus

◦Formed by spinal nerves L4 and L5, and S1 and S2 Innervates the posterior portion of the

hip, thigh, and leg, and the genital region Sciatic nerve

Sacral Sacral

PlexusPlexus

Sacral PlexusSacral Plexus