We have got to be mature like cheddar used in this delicious snack

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Reproduction

Male Reproductive System Female Reproductive system

Primary Sex Organs vs. Accessories

• Primary makes gametes• Accessories include – ducts, – genatalia – glands

Lets start with the easy stuff 1st

• Testicles• Penis• Seminal Vesicles• Epididymis • Vas Deferens • Ejaculatory Duct• Prostate Gland • Bulbourethral gland

• Leydig Cell• Sertoli Cell

http://www.google.com/url?sa=i&rct=j&q=male+reproductive+system&source=images&cd=&cad=rja&docid=j7Lk33kGZ_N0mM&tbnid=4mi29iMxlZ7jMM:&ved=0CAUQjRw&url=http://www.mayoclinic.com/health/medical/IM02745&ei=D6ZiUbSML-2I0QGS2IHgBw&bvm=bv.44770516,d.dmQ&psig=AFQjCNFDV8VsFGvlPnG5jPQSe0ZdUD_VUg&ust=1365505920115714

Mitosis vs Meiosis review

• Meiosis • Mitosis

Describe Structure and Function of the gonads and accessories

• Testicles• Penis• Seminal

Vesicles• Epididymis Seminiferous

Tubules

• Vas Deferens • Ejaculatory

Duct• Prostate Gland • Bulbourethral

gland

Chapter 27

Spermatogenesis

• Starts with 1 “spermatocyte”– Primary germ line

• End up with 4 spermatids

• How many chromosomes are in 1 spermatocyte?

• How many chromosomes are in 1 spermatid?

This meiosis happens in seminiferous tubules

Seminiferous tubules

• Lumen surounded by Sertoli Cells• Help maintain liquid environment of lumen for

sperm to develop• Prevent blood from traveling to lumen

http://www.google.com/url?sa=i&rct=j&q=spermatogenesis&source=images&cd=&cad=rja&docid=7Gzwka7mi6k4sM&tbnid=ogcX8sJUX_spWM:&ved=0CAUQjRw&url=http://www.nature.com/nrurol/journal/v9/n6/fig_tab/nrurol.2012.77_F1.html&ei=C_pjUYnJB67k4AP9goHAAQ&bvm=bv.44990110,d.dmg&psig=AFQjCNEsVPmg2QozWmdj7OzLGzO4mEel5A&ust=1365592948698365

http://www.google.com/url?sa=i&rct=j&q=sertoli+cells&source=images&cd=&cad=rja&docid=VLe8RVJ7Ryj8oM&tbnid=Cx1iXVdDFeUq5M:&ved=0CAUQjRw&url=http://www.nature.com/nm/journal/v6/n1/fig_tab/nm0100_16_F1.html&ei=9vtjUbLNMOrp0AH-nICYBg&bvm=bv.44990110,d.dmQ&psig=AFQjCNGlESpd0tBXUsGW_o5c1SegyOCsbQ&ust=1365593453834671

Gap Junctions of sertoli cells

• Mitosis of primary spermatocye happens above gap junction

• Meiosis happens below gap junction between cell membranes

Hormones involved

• Sertoli cells release messengers in response– Testosterone (T)– Follicle Stimulating Hormone (FSH)– Luetenizing Hormone (LH)– Gonadotrpoin Releasing Hormone (GnRH)

Leydig Cells

• The ones that generate and release Testosterone (T)

• T essential for proliferation and differentiation of sperm

Hypothalamus – Pituitary Gland

http://www.google.com/url?sa=i&rct=j&q=hypothalamus+pituitary+GnRH&source=images&cd=&cad=rja&docid=vfaPzyJ9tVCkFM&tbnid=OLFwKRb0a240AM:&ved=0CAUQjRw&url=http://paindr.com/opioid-induced-androgen-deficiency-2/&ei=8_1jUbGcG-e80QHF_oCwBw&bvm=bv.44990110,d.dmQ&psig=AFQjCNELJSMfhDE3jODnICPgA7xwG6ukcg&ust=1365593935102618

Quick write: How does the hypothalamus affect the testis?

Spermatogenesis

• Must be cooler than body temperature

http://www.google.com/url?sa=i&rct=j&q=spermatogenesis&source=images&cd=&cad=rja&docid=lXm-JYlirHoPRM&tbnid=uqG_zdUHa8u6oM:&ved=0CAUQjRw&url=http://pdbio325.blogspot.com/2013/04/repro.html&ei=o_ljUbicL-2p4AOUl4CYDA&bvm=bv.44990110,d.dmg&psig=AFQjCNGkZrWZ-CVXODsK8sO4NnDk5T28FA&ust=1365592859515841

Erectile Tissue

http://www.google.com/url?sa=i&rct=j&q=erectile+tissue&source=images&cd=&cad=rja&docid=100Z-q6-WDw5NM&tbnid=2Nstovt7xinJKM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.healthy-male.com%2FErectile_Dysfunction.html&ei=MV5lUZvbKafg0gHoiYG4Ag&bvm=bv.44990110,d.dmQ&psig=AFQjCNFZWHu0Am9KGtxXD3e-NJV2EoravQ&ust=1365684137573642