Search results
Results from the WOW.Com Content Network
Baculum of a dog's penis; the arrow shows the urethral sulcus, which is the groove in which the urethra lies. Fossil baculum of a bear from the Miocene. The baculum (pl.: bacula), also known as the penis bone, penile bone, os penis, os genitale, [1] or os priapi, [2] is a bone in the penis of many placental mammals.
Baculum of a domestic dog; The arrow points to the bottom groove where the urethra is located. The tip is to the right. Inside the corpus spongiosum lies the baculum.This allows the male dog to enter into the vagina before the erectile tissue is swollen.
The smallest known adult dog was a Yorkshire Terrier that stood only 6.3 cm (2.5 in) at the shoulder, 9.5 cm (3.7 in) in length along the head and body, and weighed only 113 grams (4.0 oz). The heaviest dog was an English Mastiff named Zorba , which weighed 314 pounds (142 kg). [ 2 ]
Root: It is the attached part, consisting of the bulb in the middle and the crura, one crus on either side of the bulb. It lies within the superficial perineal pouch. The crus is attached to the pubic arch. Shaft: The pendulous part of the penis. It has two surfaces: dorsal (posterosuperior in the erect penis) and ventral or urethral (facing ...
Many mammalian species have developed keratinized penile spines along the glans or shaft, which may be involved in sexual selection. These spines have been described as being simple, single-pointed structures or complex with two or three points per spine (strepsirrhines). [1] Penile spine morphology may be related to mating system. [2] [3]
Most species of placental mammals have bulbourethral glands, but they are absent in Caniformia and Cetacea. They are the only accessory reproductive glands in male monotremes. Placental mammals usually have one pair of bulbourethral glands, [3] while male marsupials have 1–3 pairs. [3] [4] [5] Of all domesticated animals, they are absent only ...
For instance, most male mammals have a penis which is stored internally until erect, and most have a penis bone or baculum. [5] Additionally, both males and females of most species do not remain continually sexually fertile as humans do and the females of most mammalian species don't grow permanent mammaries like human females do either.
Male dogs have a conspicuous penis sheath. [8] Penile sheath of a Chihuahua with cryptorchidism. In stallions, the retractor penis muscle contracts to retract the stallion's penis into the sheath and relaxes to allow the penis to extend from the sheath. [9] The penis sheath of a male axis deer is elongated and urine-stained.