A&P1: Lab Assessment 4- Integumentary System/ Carpal and Tarsal Bones

Epidermis

Outer layer of skin

stratum corneum

outermost layer of epidermis

stratum lucidum

Clear, transparent layer of the epidermis under the stratum corneum.

stratum granulosum

a layer of the epidermis that marks the transition between the deeper, metabolically active strata and the dead cells of the more superficial strata

stratum spinosum

stratum basale

the deepest layer of the epidermis consisting of stem cells capable of undergoing cell division to form new cells

Dermis

Inner layer of skin

papillary layer

outer layer of the dermis, directly beneath the epidermis; made of loose connective tissue

reticular layer

The deeper layer of the dermis that supplies the skin with oxygen and nutrients; made of dense irregular connective tissue

dermal papillae

a fingerlike projection of the dermis that may contain blood capillaries or Meissner corpuscles (of touch)

Hypodermis

the layer of skin beneath the dermis, which serves as a storage repository for fat

sweat gland

The glands that secrete sweat, located in the dermal layer of the skin.

sebaceous gland

oil-secreting gland in the dermis that is associated with hair follicles

Arrector Pili Muscle

causes the hair to stand erect

nerve ending

a tiny branch of a nerve cell that gathers information

hair follicle

a small tubular cavity containing the root of a hair

hair papilla

dermal tissue containing a knot of capillaries that supplies nutrients to growing hair

hair matrix

actively dividing area of bulb that produces hair cells

hair medulla

innermost portion of a hair shaft

hair cortex

Middle layer, hard keratin. Tapering cornified cells with pigment (gives color and connective tissue sheath around the follicle

hair cuticle

outermost layer of hair

epithelial root sheath

Extension of the epidermis lying adjacent to hair root
Widens at deep end into bulge—source of stem cells for follicle growth

dermal root sheath

dense dermis surrounding the hair follicle

scaphoid

Trapezium

trapezoid

below your index finger

hamate

pisiform

triquetrum

capitate

the wrist bone with a rounded head shape that articulates with the 3rd metatarsal

lunate

the intermediate bone in the proximal row of carpal bones

carpals

bones of the wrist

phalanges

Metacarpals I-V

Proximal phalanx I-V

middle phalanx II-V

Middle section of fingers; not the thumb

Distal phalanx I-V

talus

ankle bone; the bone with which the tibia and fibula connect to form the ankle joint

calcaneus

heel bone

navicular

cuboid

medial cuneiform

lateral cuneiform

intermediate cuneiform

metatarsal I-V

Proximal phalanx I-V

(Tarsal)

middle phalanx II-V

Middle section of toes; not the big toe

distal phalanx I-V