Anatomy Flashcards
define the haematological system
the blood
define the integumentary system
the skin
describe the location of the heart
- thoracic cavity
- deep to the sternum and costal cartilages
- protected by the ribs, vertebrae and sternum
- mediastinum (between the lungs)
- left
describe the different areas of the mediastinum
- superior and inferior
- inferior is divided into anterior, middle and posterior
define the pericardium
sac surrounding the heart
describe the two layers of the pericardium
- fibrous pericardium
2. serous pericardium (visceral and parietal)
describe the three layers of the heart
- epicardium
- myocardium
- endocardium
four cardiac valves
- tricuspid (right)
- bicuspid/ mitral (left)
- aortic
- pulmonary
describe the structure of arteries
contain elastic fibres to allow recoil
describe the sympathetic tone
low level of contraction in arterioles caused by tonic conduction of action potentials
describe the four parts of the aorta
- ascending aorta
- arch of the aorta
- thoracic aorta
- abdominal aorta
name the blood supply of the brain
circle of willis
what constituents the circle of willis
- basilar artery (right and left vertebral arteries)
- right internal carotid
- left internal carotid
what is the blood brain barrier made up of?
- tight junctions
- astrocytes
define an anastomoses
more than one path (each alternative route is called a collateral)
two main venous systems?
- hepatic portal venous system
2. systemic venous system
describe the two layers of the bone
- outer cortex made of cortical bone
2. inner medulla made of trabecular/cancellous bone
what is the outer shell of the bone called?
periosteum
five classes of bones
- flat
- long
- short
- sesamoid
- irregular
define the foramina
Hole which allows cranial nerves and blood vessels into the skull
how many cervical vertebrae are there?
C1-C7
thoracic vertebrae
T1-T12
lumbar vertebrae
L1-L5
sacral vertebrae
5 fused to form 1 sacrum
coccygeal vertebrae
4 fused to form 1 coccyx
name C1 vertebrae
atlas
name C2 vertebrae
axis
name C7 vertebrae
vertebrae prominens
describe the three different rib types
- 7 true ribs
- 8-10 are false ribs
- 11-12 are floating ribs
bones of the appendicular skeleton
- pectoral girdle (2 scapula, 2 clavicles)
- pelvic girdle ( 2 hip bones and sacrum)
- upper limbs
- lower limbs
types of skeletal muscle
- pennate
- quadrate
- flat
- fusiform
- circular
two points of attachment of skeletal muscles to bone
- origin
- insertion
describe muscle paralysis
dysfunctional motor nerve supply, no contraction, reduced tone
define muscle spasticity
descending controls from the brain not working, increased tone.
describe the location of skeletal muscles
deep to the deep fascia
tough fibrous connective tissue covering
define compartment syndrome
increased pressure in the fascia by fluid affects functions of muscles and nerves
functions of the skeleton
- protects organs
- calcium metabolism
- red blood cell formation
- attachment for skeletal muscles
three types of joints
- fibrous
- cartilaginous
- synovial
two subtypes of fibrous joints
- syndesmoses
2. sutures
define fontanelles
soft spots on the neonatal skull
two subtypes of cartilaginous joints
- primary (synchondroses)
2. secondary (symphyses)
five subtypes of synovial joints
- pivot
- plane (minimal movement in one plane)
- hinge
- biaxial (more movement in one plane than another)
- ball and socket
features of a synovial joint
- muscles and tendons
- bursae
- ligaments
- hyaline cartilage
- joint cavity
- capsule
define subluxation
reduced area of contact between articular surfaces
define dislocation
complete loss of contact between articular surfaces
define proprioception
sense of joint position
describe the location of the pelvic cavity
lies within the bony pelvis
continuous with the abdominal cavity
name the pelvic roof
peritoneum
two pouches of the peritoneum
- vesicle-uterine pouch
2. rectouterine pouch
three layers of the uterus
- perimetrium
- myometrium
- endometrium
features of the seminiferous tubules
- body temp a degree colder
- temp controlled by dartos muscles
journey of the sperm
- rete testes
- epididymis
- vas deferens
- seminal gland (ejaculatory duct)
- prostate gland
- urethra
functions of the GI tract
- introduce food into the body
- digest and absorb nutrients
- excrete waste
structures in the oral cavity
- lips
- teeth
- hard palate
- cheek mucosa
- tongue
- floor of the mouth
muscles that control chewing
muscles of mastication:
- masseter
- medial pterygoid
- lateral pterygoid
- temporal
define the orbicularis oris
circular muscle surrounding the mouth, prevents dribbling
name the tonsils
palatine
three glands involved in saliva
- parotid
- submandibular
- sublingual
three sections of the pharynx
- nasopharynx
- oropharynx
- laryngopharynx
which parts of the pharynx are used in the respiratory pathway
- oropharynx
- laryngopharynx
three parts of the small intestine
- duodenum
- jejunum
- ileum
structures of the large intestines
- caecum
- ascending colon (retroperitoneal)
- transverse colon (intraperitoneal)
- descending colon (retroperitoneal)
- sigmoid colon (intraperitoneal)
two divisions of the nervous system
- CNS
2. PNS
name nerve cell bodies in the CNS
nucleus
name nerve cell bodies in the PNS
ganglion
name bundles of axons in the CNS
tract
name bundles of axons in the PNS
nerve
three classes of neurons
- afferent neurones
- efferent neurons
- interneurons
define a synapse
site of chemical communication between two or more neurones
three sections of the brain stem
- midbrain
- pons
- medulla oblongata
describe grey matter in the brain
outer area full of cell bodies
describe white matter in the brain
inner area containing myelinated axons
describe white matter in the spinal cord
outer area full of myelinated axons
describe grey matter in the spinal cord
inner area full of cell bodies
three divisions of the PNS
- cranial nerves
- spinal nerves
- autonomic nerves
three layers of the nerve
- epineurium
- perineurium
- endoneurium
how many bilateral pairs of spinal nerves?
31
number of cervical spinal nerves
8
number of thoracic spinal nerves
12
number of lumbar spinal nerves
5
number of sacral spinal nerves
5
number of coccygeal spinal nerves
1
define a dermatome
area of skin supplied by both anterior and posterior rami
define nerve plexus
network of intertwined anterior rami
cervical plexus
C1-C4 anterior rami
brachial plexus
C5- T1 anterior rami
lumbar plexus
L1-L4 anterior rami
sacral plexus
L5- S4 anterior rami
sympathetic outflow
thoracolumbar outflow T1-L2
parasympathetic outflow
cranial nerves III, VII, IX, X
name pain receptors
nociceptors
sympathetic nerves, length of preganglionic nerve
short
three routes of sympathetic outflow
- Anterior/ posterior rami
- sympathetic chain
- splanchnic nerves (prevertebral ganglion)