Examination shows that the heart of andrias davidianus have three chamers - two atria and one ventride , the atria on the left of midline , the ventricle on the right of midline , and the atria are divided into two cavities by septum interatriale . there are four valvula semilunaris in conus arteriosus , but no spiral valve in conus arteriosus . the coronary artery is made by arterica carotis externa branches 研究结果表明,中国大鲵循环系统解剖学特点为: 1 .心脏:心房心室为左右排列,两心房前后排列,共有4对动脉弓,其中第二、三对动脉弓汇合成一条背主动脉;动脉圆锥基部与心室相接处有4个瓣膜,动脉圆锥内没有螺旋瓣,动脉圆锥与腹侧主动脉干之间有3个半月瓣;房间隔有穿孔;冠状动脉由颈外动脉的分支汇合而成。
前后: around; about排列: arrange; rank; place; range; ...前后排列的: tandem前后排列时间表: tandem schedule后排: back row 坐在后排的一个座位上 take a seat on a back row; 后排插上战术 back-setter-move forward play (球类运动)按时间先后排列的事件: events in chronological order ie according to times dates etc前后排座位错开的布景形式: staggered seating前后: 1.(时间接近) around; about 春节前后 around the spring festival2.(自始至终) from start to finish; from beginning to end; altogether 这篇小说从动笔到定稿, 前后用了一年时间。 the novel took a year to write altogether, from start to finish. 他前后来过四五次。 he has been here four or five times altogether.3.(前面和后面) front and back 受到前后围攻 be attacked both front and back; be caught between two fires; 房子前后都是果树。 there are fruit trees in front and at the back of the house传后排: backrow set后排气: final vacuum后排右: back raght; back right后排中: back centre; cb; centre back后排左: back left; lb排列: 1.(顺次序放) arrange; rank; place; range; put in order; arrangement; permutation 排列成行 arrange in a row [line; column]; 按字母顺序排列 arrange in alphabetical order; 依大小次序排列 arrange in order of size;汽车沿着道路排列。cars lined the road.2.[数学] permutation; 排列表 [讯] permutation table; 排列方向 orientation; 排列符号 permutation symbol; 排列规则 queueing discipline; 排列凌乱的 misarranged; 排列数 number of permutations; 排列索引 permutation index; 排列天线阵 tier array; 排列项 line item; 排列因数 array factor; 排列者 arrayer; 排列整齐 marshalling; 排列组合 [数学] permutation and combination后排保护: back up后排打法: back play后排队员: back field player; back lihe player; back line players; back row player; back tk后排肥管: rear distributor spout后排观众: pittite后排进攻: back line offence/back row attack后排扣球: back attack后排水杆: aft water drain mast后排位置: back court position后排席位: back benches后排中座: middle rear seat