Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.3  The epidermis of thick skin.

Epidermis•Stratum corneum

Dermis

•Stratum spinosum•Stratum basale

•Stratum granulosum

•Stratum lucidum

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.3  The epidermis of thick skin.

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7a  Structure of a hair and hair follicle. (a) Longitudinal section of a hair within its follicle.

ArrectorpiliSebaceousgland

Hair root

Hair bulbin follicle

Hairshaft

(a)

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7a  Structure of a hair and hair follicle. (a) Longitudinal section of a hair within its follicle.

(a)

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7b  Structure of a hair and hair follicle. (b) Hair.

Cuticle

Cortex

Medulla

(b) Hair

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7b  Structure of a hair and hair follicle. (b) Hair.

(b) Hair

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7c   Structure of a hair and hair follicle. (c)  Enlarged longitudinal view of the expanded hair bulb in the follicle showing the matrix, the region of actively dividing epithelial cells that produces the hair.

Hairfollicle

Matrix (growthzone) in hair bulb

Connective tissuepapilla containingblood vessels

Melanocyte

DermalsheathEpidermalsheath

(c)

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.7c   Structure of a hair and hair follicle. (c)  Enlarged longitudinal view of the expanded hair bulb in the follicle showing the matrix, the region of actively dividing epithelial cells that produces the hair.

(c)

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.9a  Structure of a nail. (a) Surface view.

Body ofnail

Lateralnail fold

Lunula

Cuticle

(a) Surface view

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.9a  Structure of a nail. (a) Surface view.

Surface view

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.9b  Structure of a nail. (b) Longitudinal section of the distal part of a finger.

Nailmatrix

Root ofnail

Proximalnail fold

Cuticle Body of nail

Nail bed

Free edgeof nail

Bone offingertip

Stratum basale

(b) Longitudinal section of the distal part of a finger

Essentials of Human Anatomy and Physiology, 9eby Elaine N. Marieb

Copyright © 2009 Pearson Education, Inc.,publishing as Pearson Benjamin Cummings.

Figure 4.9b  Structure of a nail. (b) Longitudinal section of the distal part of a finger.

(b) Longitudinal section of the distal part of a finger

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings

Appendages of the Skin

Figure 4.6b

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings

Appendages of the Skin

Figure 4.6a