4 primary muscles of mastication
- Masseter
- Temporalis
- Medial pterygoid
- Lateral pterygoid
Masseter
- origin
- insertion
- position
- orientation
- innervation
origin - zygomatic arch
insertion - angle of mandible
position - anterior to TMJ
orientation - elevation + protrusion of mandible
innervation - mandibular division of trigeminal nerve
What is the tissue type of the epidermis?
Stratified squamous keratinized epithelium
What is the tisssue type of the dermis?
Dense regular connective tissue
What is the tisssue type of the dermis?
Dense regular connective tissue
What is the tissue type of the hypodermis?
Adipose tissue
3 specialised cell types
- Melanocytes
- Langerhans cells
- Merkel cells
Function + location of melanocytes
Produce melanin
Seen in stratum basale
Function + location of langerhans cells
Act as macrophages
Seen in stratum spinosum
Function + location of Merkel cells
Act as receptor cells
Seen in stratum basale
5 layers of epidermis (deep —> superficial)
- Stratum basale
- Stratum spinosum
- Stratum granulosum
- Stratum lucidum
- Stratum corneum
2 layers of the dermis
- Papillary layer
- Reticular layer
Sebaceous glands
- secrete sebum
- holocrine gland (entire cell destroyed to release secretion)
- usually open to hair follicle
- contraction of arrest or pilli muscles releases secretions
Arrest or pilli muscles
- Sundale of smooth muscle
- contraction pulls hair follicle upright
- under sympathetic control
3 layers of blood vessels
- Tunica intima
- Tunica media
- Tunica adventitia
Tunica intima
- inner layer endothelium = simple squamous epithelium
- subendothelial connective tissue = loose areolar connective tissue
Tunica media
- smooth muscle and elastic fibres
Tunica adventitia
- loose areolar connective tissue
- contain vasa vasorum
Vasa vasorum
Blood vessels supplying blood vessels
Internal elastic lamina
Seen between the sub endothelial layer and tunica media
External elastic lamina
Seen between tunica media and tunica adventitia
What tisssue type is the lymph node made up of?
Dense connective tissue
Paracortex contains ___ cells
T cells
Lymphoid follicles are made up of ___ cells
B cells
