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Shark Turtle Pigeon

Oral, Coelom andDigestive

- No distinction betweenesophagus and stomach

- Papillae within esophagus,rugae within stomach

- Valvular intestine with spiralvalve to increase surface area

- with teeth- primary tongue- has a median liver lobe

- no teeth but has horny beaks(epidermal)- definitive tongue-arytenoid cartilages on each sideof the glottis-divided into 2 pleuroperitonealand pericardial cavity

- no teeth have hornybeak (epidermalorigin)

- compound definitivetongue with posteriorfimbriated borders

- have palatal folds !hard palate (splitpalate)

- presence of crop(temporary foodstorage)

- gi""ard ! stomach

-2 bile ducts

- absence ofgallbladder 

- absence of ischialand

- pubic symphyses- absence of urinary

bladder - divided into # 2

pleural cavities,pericardial cavity,

peritoneal cavity

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Respiratory   - gill slits $ gill pouches $e%ternal gill slits

- lamellae respiratorymechanism

-

-gills& gill slits are absent   - gill slits are absent- presence of syrin%

(voice)

Circulatory   - heart is a one-way tube with #chambers

- with sinus venosus and conusarteriosus

- 'lood V*+- *ontains only venous blood- afferent and efferent blood

vessels (sends blood to andfrom the heart, respectively)

-presence of ventral and dorsalaorta

- presence of lateral abdominalveins

- chambers ventricle and2 atria

- with sinus venosusattached to right atrium

- conus arteriosus andventral aorta disappeared

-  heart descendedposteriorly

- paired ventral abdominal

veins

- no sinus venosus(ultimately reduced)

- conus arteriosus splitinto 2

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rogenital   - kidneys aremesonephroi&opisthonephroi

- .olffian ducts both for malesand females

-Presence of chromaffinemasses (suprarenal bodies)

/n females- slight enlargement in oviduct

(shell gland- secretes thinmembrane)

- does not have a collectingkidney tubule but goes directlyto mesonephric duct

/n males- behind the epididymis,

secretes fluid beneficial forsperm (0eydig1s gland)

- seminal vesicle does not havea kidney tubule from theopisthonephros but has anaccessory urinary duct

- kidneys are metanephroiwith their own ducts, theureters

-

- /n females, there isonly one ovary andoviduct on the leftside

-idneys aremetanephroi3 lobedorgan